A documentary examining the case of Heather Mook, who was convicted of poisoning her husband John, is set to air. The film focuses on the circumstances surrounding the crime, in which Heather Mook used rat poison to fatally poison John.

The incident reportedly arose after Heather Mook sought to conceal the theft of more than £40,000 from her mother-in-law. The documentary explores the investigation into the case and the motives that led to the poisoning.

Authorities established that the use of poison was an attempt to cover up the financial crime, which prompted the criminal proceedings. The film offers an in-depth review of the evidence and court proceedings, shedding light on the complexities of the case.