My Roommate Is a Detective Episode 17 Recap

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> My Roommate Is a Detective Recap

Lu Yao returned to the medical school to continue his investigation. While his findings confirmed Lin Ai’s alibi—that her experiment results proved her presence in the lab—the trail of clues seemed to run cold. Qiao Chusheng, feeling stuck, listened as Lu Yao suggested a different approach: to investigate the origins of the human body specimens used at the university.

Bai Youning, a reporter, had previously hinted at the "revenge of the specimens," and Lu Yao believed this might be a key. Qiao Chusheng managed to obtain old records of collected bodies from Liu Mo. However, these records were deliberately vague, a consequence of the controversial and often unethical methods used to acquire bodies over the years, including from execution grounds or the black market, all under the guise of "medical progress."

Lu Yao, displaying his sharp intellect, narrowed down the investigation: he instructed Qiao Chusheng to focus only on bodies acquired during Guan Dailiang and Liu Yansheng's six-year tenure at the university, excluding those from before they attended school or after they parted ways. He also shrewdly deduced that any "picked up" or dismembered bodies could be ruled out, as the effort involved in obtaining a complete body for a partial specimen was simply too high.

Lu Yao then concluded that the most logical place to continue their search for information was the hospital where Guan Dailiang and Liu Yansheng had both worked, as it offered convenient access to patient records and time for interaction with families, which would facilitate body donations. At the hospital, Qiao Chusheng successfully obtained medical records. Lu Yao, feigning an inability to read the doctor's messy handwriting, attempted to leave, but Qiao Chusheng insisted they review the documents.

They soon found the case of Lin Shiyu, a ten-year-old boy who had died from epidemic cerebrospinal meningitis, a disease Guan Dailiang and Liu Yansheng had specifically studied. Lu Yao noted the unusually meticulous detail in Lin Shiyu’s medical record, which he suspected was fabricated, particularly given Guan Dailiang's known sloppy handwriting.

A sudden realization struck Lu Yao: the name Lin Shiyu, combined with his father Lin Yuan, and a classical poem that subtly linked Lin Shiyu's name to Lin Ai's given name, "Lin Tingyun," strongly suggested that Lin Ai was Lin Shiyu's older sister. Lin Yuan had, in fact, given his consent to Guan Dailiang and Liu Yansheng for his son's body to be used as a specimen. With this critical insight, Lu Yao immediately decided to confront Lin Ai.

He also recalled earlier evidence that Guan Dailiang had visited Lin Ai’s lab after midnight on the night of his death, leaving a distinctive bitten cigarette butt in her trash. Furthermore, Lu Yao found it peculiar that Lin Ai, despite her otherwise excellent academic performance in theoretical medical subjects, consistently performed poorly in practical anatomy, which required hands-on dissection of bodies. He believed her strong aversion to handling corpses was a significant clue.

Upon arriving at the medical school, Lu Yao and Qiao Chusheng were met with chaos: a dormitory building had exploded and caught fire. Among the casualties, Lin Ai was found in room 206, her body severely disfigured. This distinct method of death led Bai Youning to suggest that it was the work of resentful spirits. Patrol officers later reported that Lin Ai’s true name was Lin Tingyun.

It was revealed that six years prior, her mother had remarried, leaving her younger brother under their father’s care. Her brother had fallen ill and tragically died during treatment at St. George’s Medical School. Adding another layer of complexity, Salim’s team discovered a letter from Lin Tingyun at Liu Yansheng’s residence. The letter accused both Liu Yansheng and Guan Dailiang of providing "negative treatment" to her brother, Lin Shiyu, while secretly using him for unauthorized medical experiments.

It stated that they had then manipulated her father, Lin Yuan, with "double talks" to obtain consent for Lin Shiyu's body to be turned into a specimen. Lin Tingyun, writing as Lin Ai, vowed that she possessed irrefutable evidence and intended to make both Liu Yansheng and Guan Dailiang pay a painful price.

Following this revelation, Qiao Chusheng immediately went to investigate the ruins of Lin Ai's house, while Lu Yao proceeded to the medical school to retrieve Lin Ai’s personal belongings. Qiao Chusheng's investigation at Lin Ai's destroyed apartment confirmed that the incident was a gas explosion with no signs of forced entry, leaving the exact cause – accident or suicide – ambiguous. Meanwhile, Lu Yao examined Lin Ai’s experimental notes.

He discovered that she had successfully reduced the cultivation time for soybean rhizobium by twenty minutes. This timeframe, Lu Yao asserted, was ample for committing murder and disposing of a body. He also noted the presence of empty capsules with dark purple traces, indicating contact with potassium permanganate, and a gastric tube, suggesting a method for delivering the substance into a victim's stomach to cause specific chemical reactions post-mortem.

Qiao Chusheng, connecting these details, concluded that Lin Ai was the serial killer and that the case was closed, regardless of whether her death was accidental or suicidal. However, Lu Yao remained unconvinced. While Bai Youning was cooking, Lu Yao observed that a typical stove explosion would not cause a house to collapse entirely.

This led him to deduce that Lin Ai’s apartment must have contained other highly flammable and explosive materials beyond just natural gas to achieve such destructive power. Prompted by this realization, Lu Yao went to the medical school to inquire about any missing human specimens from Liu Mo. Liu Mo initially resisted, emphasizing the rarity and value of the specimens.

However, Lu Yao threatened to accept a teaching position at the medical school, vowing to make Liu Mo's daily life miserable, which prompted Liu Mo to grudgingly allow Lu Yao to investigate. Bai Youning subsequently arrived and assisted Lu Yao in searching the specimen pool, where they discovered that a significant number of localized, partial specimens were missing. When combined, these missing parts formed the exact components needed to construct a complete human body.

Armed with this discovery, Lu Yao presented a new theory to Qiao Chusheng. He proposed that the dismembered corpse found at Lin Ai’s apartment was not Lin Ai, but rather a body assembled from the partial human specimens missing from the medical school. He explained that these formalin-rich specimens, when heated or exposed to open flames, could produce explosive vapors.

He theorized that such an explosion would shatter the body, intentionally obscuring its identity and cause of death to facilitate a staged death. In this theory, Lu Yao suggested that Lin Ai had faked her own death using these body specimens and the gas explosion to escape.

Qiao Chusheng immediately issued an urgent city-wide warrant for Lin Ai’s arrest, assigning Salim to secure all city exits and instructing A Dou to investigate Lin Ai's social and familial connections for any potential concealment. Concurrently, Lu Yao provided Qiao Chusheng with Liu Yansheng’s photograph, suggesting that he might be trying to flee by ship to Southeast Asia, based on a subtle clue involving matchboxes from a specific restaurant.

Qiao Chusheng dispatched Liuzi and his team to stake out the docks, emphasizing discretion. Liu Yansheng was subsequently apprehended. Bai Youning was initially stunned, believing Liu Yansheng to be a ghost due to his alleged death. Lu Yao, however, meticulously explained the true sequence of events. He clarified that the body found in Liu Yansheng’s bathtub was not his own, but a complete human specimen that Guan Dailiang had preserved in formalin.

Its distinct, overly prominent birthmark was, ironically, a giveaway of its inauthenticity, contrasting with the faded appearance typical of formalin-soaked bodies. Lu Yao revealed that Liu Yansheng had earlier used a trolley to transport this complete specimen out of campus, deceptively labeling it as animal carcasses for experiments.

The decomposed body later found at the medical school, which was quickly buried by unsuspecting staff, was actually a newly pieced-together specimen, made to appear as if it were the “lost” original specimen. Liu Yansheng further manipulated Guan Dailiang’s body, using a reaction between formalin and potassium permanganate to cause his eyes and mouth to open post-mortem, with the facial damage being a deliberate part of his plan.

Lu Yao characterized this as a "five-bird-with-one-stone" strategy: to create a ghastly atmosphere, draw immediate attention to Guan’s identity in the formalin, cause severe damage to impede autopsy results, provide a necessary condition for Liu Yansheng’s own faked death, and establish a false narrative of a serial murder case, thereby diverting suspicion from himself. He emphasized that the freshly embalmed, complete specimen used for his own “fake” death would be less prone to detection.

Liu Yansheng was indeed the one who had secretly entered Lin Ai’s residence, setting up the formalin and the mechanism that triggered the fatal gas explosion, which truly killed Lin Ai. He also deliberately placed potassium permanganate capsules and a gastric tube in Lin Ai’s locker, along with Lin Ai’s genuine three-year-old letter, to frame her for the killings.

Lu Yao deduced that Lin Ai’s letter, mentioning a “price,” was a clear reference to blackmail, not revenge, as Liu Yansheng’s bank account showed regular transfers to Lin Ai. Liu Yansheng confessed to killing Lin Ai, claiming he was driven to desperation by her continuous blackmail.

He further admitted to the other murders, stating that Guan Dailiang, influenced by the St. George University board members who prioritized profits from expensive drugs, had reported him, destroying his life-saving research on epidemic cerebrospinal meningitis. This series of murders was both an act of private revenge and a calculated attempt to fake his own death, allowing him to escape and continue his vital research in a safer environment.

Lu Yao inferred Liu Yansheng’s intention to flee to Southeast Asia based on a subtle clue: Liu Yansheng’s choice to buy breakfast from a distant restaurant in the Japanese Concession, known to be near a shipping company selling limited tickets to Southeast Asia, rather than a closer establishment. Lu Yao later confided in Qiao Chusheng that his earlier actions, including the false lead against Lin Ai, were deliberate attempts to avoid alerting Liu Yansheng during the investigation.

While acknowledging the potential societal benefits of Liu Yansheng’s research, Lu Yao stated that his actions were still criminal. Qiao Chusheng proceeded to arrest Liu Yansheng, promising to try and secure a deal for him to continue his research in prison. Separately, Lu Yao implored Bai Youning not to publish the full, sensitive details of the murder motives—specifically, the corrupt practices of St. George University’s board—to avoid damaging the university’s reputation and crushing the hopes of its students.

Following the case, Qian Rui persistently tried to recruit Lu Yao to teach at St. George University, even offering a higher salary. Lu Yao, however, expressed disinterest, claiming he was unsuitable for teaching and couldn’t tolerate instructing “idiots” like Liu Mo. Qian Rui eventually confessed that the offer was at the insistence of Lu Yao’s father, Lu Zifu, who was concerned about Lu Yao’s current associates and wished for him to pursue a more “proper job.”

Later, while Lu Yao was cooking, Bai Youning playfully interrogated him about his past relationship with an ex-girlfriend from Cambridge who studied economics. She accused him of abandoning her without a word, prompting Lu Yao to defend his actions by claiming he grew tired of relationships quickly and was too young to commit, finding endless possibilities in life. Bai Youning sharply criticized him, calling him “shameless” and worse than a “beast.”

Concurrently, Bai Qili met with Norman, seeking his crucial vote to secure a position on the school board of St. George University. Norman initially declined, citing his ample friendships. However, Bai Qili subtly leveraged his knowledge of the recent serial murders at St. George University, implying that he possessed information about the “true masterminds” behind the incidents, and threatening to expose these details publicly. Faced with this veiled threat, Norman was compelled to yield and compromise.

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