A former wife who plotted a fatal acid attack on her ex-husband in February 2024 has been convicted of manslaughter and attempted kidnapping at the Central Criminal Court. The jury returned the verdict after a two-week trial, delivering a unanimous decision that sends a clear message about domestic violence escalating to lethal extremes.

Prosecutors revealed that the defendant, 38-year-old Lisa Voss, had meticulously planned the assault with an accomplice, a former business partner of her ex-husband, Daniel Mercer. Surveillance footage from a London railway station on the morning of February 12, 2024, shows Voss handing a container of corrosive liquid to the accomplice, who then approached Mercer while he waited for a train.

Within minutes, Mercer was drenched in sulfuric acid, suffering third-degree burns over 40% of his body. He was rushed to St. Thomas’ Hospital but died two days later from his injuries. Forensic analysis confirmed the acid’s chemical composition matched a batch purchased by Voss just days prior under a false name.

The accomplice, identified as Paul Hargrove, 45, had previously worked with Mercer in their logistics startup before the business collapsed amid acrimonious disputes. Hargrove, who pleaded guilty to lesser charges last month, testified against Voss in exchange for a reduced sentence. His cooperation provided critical evidence linking Voss to the premeditated attack.

During the trial, prosecutors presented text messages exchanged between Voss and Hargrove, where she repeatedly referred to Mercer as a “threat” she needed to “neutralize.” The messages, timestamped just hours before the attack, included a chilling directive: “Make sure he suffers.” Defense attorneys argued Voss was acting in self-defense, claiming Mercer had physically abused her during their marriage, but medical records and witness testimonies contradicted this narrative.

Neighbors described Voss as a reclusive figure in her North London apartment, rarely interacting with others. However, court documents revealed she had taken out a life insurance policy on Mercer just three weeks before the attack, naming herself as the sole beneficiary for £1.2 million. The policy’s timing and Voss’s financial gain became a focal point for investigators, who alleged premeditation.

1. February 12, 2024 — Acid attack on Daniel Mercer at London Bridge station
2. February 14, 2024 — Mercer dies from injuries at St. Thomas’ Hospital
3. March 2024 — Voss arrested after forensic evidence links her to the acid purchase
4. June 2025 — Trial begins at the Central Criminal Court
5. October 2025 — Jury delivers guilty verdicts on all counts

The case has reignited debates about accountability in domestic violence cases, particularly when victims retaliate against abusers. Legal experts note that while premeditation often leads to murder convictions, manslaughter charges in such scenarios can hinge on the absence of direct evidence proving intent to kill. This verdict, however, marks a rare instance where a defendant’s planning and financial motive outweighed claims of self-defense.

Voss now faces sentencing on November 15, 2025. The judge has indicated a minimum term of 20 years, citing the “calculated cruelty” of the attack. Her accomplice, Hargrove, is expected to be sentenced next month after cooperating fully with authorities. The case serves as a grim reminder of how domestic conflicts can spiral into fatal violence when left unchecked by intervention or legal safeguards.