16th Seduction (women's Murder Club, #16)

The sixteenth installment in the Women's Murder Club series follows SFPD Homicide sergeant Lindsay Boxer across two intertwined investigations, a high-profile terrorism trial, and a crisis in her personal and professional life.

The novel opens with Lindsay and her partner, Inspector Rich Conklin, on a counterterrorism stakeout in San Francisco's Tenderloin neighborhood. Their task force reports to Chief of Police Warren Jacobi and the deputy director of the Department of Homeland Security (DHS). They are tracking a suspected operative of GAR (Great Antiestablishment Reset), a decentralized global terrorist network responsible for mass attacks in six countries. When the operative, known only as J., drives a van toward San Francisco International Airport, Lindsay cuts off his escape route. J. jumps from a departures overpass and detonates a suicide vest, killing only himself. Jacobi praises the partners for preventing a mass-casualty attack and orders them to stand down.

One month later, Lindsay has an anniversary dinner with her estranged husband, Joe Molinari, a former deputy director of Homeland Security. Their separation began when Lindsay discovered Joe had been secretly working for the CIA and keeping a double life. During dinner at a waterfront restaurant, an explosion destroys Sci-Tron, a massive science museum on neighboring Pier 15. Amid the chaos, Lindsay notices a man standing motionless, smiling at the destruction. He identifies himself as Connor Grant, takes full credit for the bombing, and calls himself a "citizen, genius, artist par excellence." Lindsay arrests him. Joe runs into the wreckage to search for survivors but is struck by debris from a secondary explosion and loses consciousness. At the hospital, a surgeon diagnoses an acute subdural hematoma and operates to relieve pressure on his brain.

Television reports confirm 25 dead and 45 injured. GAR releases a video claiming responsibility, though analysts question whether a children's science museum fits GAR's typical targets. When Lindsay and her commanding officer, Lieutenant Jackson Brady, interrogate Grant the next morning, he fully recants his confession and requests a lawyer. A search of his Bayview home yields no weapons, but his garage contains a chemistry laboratory where Conklin discovers a manuscript titled "How to Make a Bomb: For Twenty-Five Dollars in Twenty-Five Minutes, by Connor A. Grant."

Meanwhile, Claire Washburn, the city's chief medical examiner and Lindsay's closest friend, alerts her to a suspicious pattern: A woman brought in with the blast victims has a puncture wound matching one Claire found months earlier on a cabdriver. Claire suspects someone is killing people at random with an injected substance that leaves no detectable trace.

Jacobi assigns Lindsay to lead a SWAT-supported raid on a house in Ingleside, where the GAR video has been traced to four young former fraternity brothers. They are arrested and charged federally with threatening communications, but investigators find no evidence connecting them to the actual bombing.

Yuki Castellano, a former ADA recruited back by DA Leonard "Red Dog" Parisi, serves as lead prosecutor on Grant's case. At the arraignment, Grant pleads not guilty, and the judge denies bail. When the trial begins, Grant fires his attorney, Elise Antonelli, and represents himself, with Antonelli as standby counsel. Grant delivers a polished opening, portraying himself as a wrongly arrested bystander and hammering the refrain: "One suspect. No evidence."

Lindsay testifies about Grant's confession. Grant cross-examines her effectively, establishing she did not record the confession, did not see him leave the museum, and found nothing incriminating on his person. Joe testifies from a wheelchair, but Grant insinuates his corroboration stems from marital loyalty. CSI director Charlie Clapper testifies about the bomb-making materials, yet admits no physical evidence links Grant to the explosion. Grant introduces an alibi witness who places him at a hotel during part of the evening and calls Brady to the stand, revealing that Brady is married to ADA Castellano and implying collusion. The jury returns a unanimous not-guilty verdict on all 25 counts. Cary Woodhouse, a retired army master sergeant whose wife died in the bombing, publicly threatens Grant.

Following the acquittal, Grant is shot at and later beaten. Antonelli files a complaint against Lindsay with the SFPD's Internal Affairs Bureau (IAB), accusing her of false imprisonment and fabricating Grant's confession. The mayor promises a thorough investigation.

The serial injection case, which the media dubs the "Stealth Killer" investigation, intensifies as more victims surface. Claire connects five deaths caused by succinylcholine, a fast-acting paralytic that metabolizes into a naturally occurring substance, making it virtually undetectable. An EMT finds a discarded vial of the drug near the latest victim, and its lot number traces to Saint Vartan's Medical Center. Lindsay and Conklin follow the trail to the hospital's basement, where a pharmacy assistant reveals an underground tunnel connecting the hospital to the Hyde Street Psychiatric Center. At the center, they question staff but find no suspect. As they leave, a patient named Neddie approaches in a childlike voice. Lindsay dismisses him as harmless.

In chapters told from his perspective, Edward "Neddie" Lamborghini is revealed as the killer. A resident of the psychiatric center for over 30 years, Neddie killed his four-year-old sister at age seven and was deemed incompetent to stand trial. He presents himself as cognitively impaired, but the persona is a calculated act. Over decades, he has mapped San Francisco's underground tunnel network, using it to move unseen through the city and steal expired succinylcholine from Saint Vartan's. He kills at random with a syringe he calls his "sharp."

After Neddie's nighttime absences are reported, Lindsay and Conklin spot him leaving the center with a purposeful gait unlike his usual persona. When he returns, they confront him. He darts into a garbage room and takes a maintenance worker hostage, pressing a loaded syringe to the man's neck. Speaking in his real voice, Neddie confesses to killing eight people and demands safe passage. Lindsay negotiates, but Neddie pushes the plunger. Conklin fires, killing Neddie. Medical teams save the hostage. Lindsay gives Cindy Thomas, a crime reporter for the San Francisco Chronicle and a member of the Women's Murder Club, the story on the record.

DHS analysts discover digital links between the computer of Dylan Mitchell, an anarchist broadcaster who goes by "Haight" and produces content aligned with GAR's ideology, and the computers of both J. and Andrew Yang, one of the four young men arrested in the Ingleside raid. An encrypted email Grant sends to Mitchell, thanking him for his "guidance" and "encouragement," is also intercepted. Lindsay and Conklin join a SWAT raid on Mitchell's factory in the Dogpatch neighborhood. Mitchell is arrested, and Conklin finds Grant's bomb-making manuscript under his bed.

Chapters from Grant's perspective reveal his true identity. Born Adam Kingsley in Wisconsin, he set a fire as a ninth grader that killed his entire family, then assumed a new identity. Over decades, he cycled through multiple personas, engineering deaths to create fresh identities. He now plans to assume the identity of an investment banker killed in a fire he set on the night of the Sci-Tron bombing and flee to Zurich.

Grant takes a taxi to City Hall, intending to leave a duffel bag of explosives at a valet ramp. Woodhouse, who has been conducting surveillance with his family since the trial, follows the cab and fires a rifle shot. Grant fires back, hitting Woodhouse in the shoulder. Woodhouse returns fire, striking the taxi's trunk and detonating the explosives. The blast kills Grant. City Hall sustains damage, but the surrounding historic buildings remain standing.

The next day, Lindsay receives a letter from the IAB dismissing the complaint, stating she did her job "by the book." She invites Joe home for dinner. They cook together and talk about their future and their toddler daughter, Julie. After putting Julie to bed, they reconnect for the first time since their separation. In the morning, Julie crawls into bed between them, looks at each parent, and says, "Nice." Lindsay chooses to move forward with her family.