A farmer has been found guilty of adding metal shards to baby food in a plot to blackmail Tesco.
Nigel Wright, from Market Rasen in Lincolnshire, tried to extort £1.4m from the supermarket chain.
The Old Bailey heard how two mothers were moments away from feeding their infants when they spotted the shards.
Wright was convicted of three counts of blackmail and two charges of contaminating goods. He will be sentenced on 28 September.
The 45-year-old was convicted of a further charge of blackmail for demanding £150,000 worth of Bitcoin from a driver with whom he had a road rage altercation.
Mr Justice Warby asked for a psychiatric report to be prepared ahead of Wright’s sentencing hearing saying: “(Wright) has or appears to be mentally disordered.”
The judge warned Wright that he faced a lengthy custodial sentence, telling him that punishments for these types of offences range from between eight and 17 years in prison.
When police raided his sheep farm they found photographs of contaminated baby food and draft blackmail notes on his laptop.
One note read: “Imagine a baby’s mouth cut open and blood pouring out, or the inside of their bellies cut and bleeding. You pay, you save them.”
Wright, who signed off as the fictional character “Guy Brush” and “the Dairy Pirates”, claimed to be part of a cohort of farmers angry at the low price they were paid for their milk.
The farmer admitted placing a jar of Heinz baby food on a shelf in a store in Lockerbie, but claimed he was forced into it by travellers who threatened to kill him and his family, the court heard.
The discovery of the jar in Scotland prompted Tesco to issue a product recall.