Graham Wise, 42, sprayed Carol Lindsay with ammonia in the Clackmannanshire store last year. His colleague Halil Aksu also had blurred vision during the attack and had to be treated by paramedics at the scene.
A man who was jailed for blinding a post office with chemicals in an armed raid has been found dead in prison.
Graham Wise, 42, sprayed and blinded Carol Lindsay with ammonia at Alloa’s store in Clackmannanshire in January last year.
His colleague Halil Aksu also had blurred vision during the attack and had to be treated by paramedics at the scene.
Wise was sentenced to six years and four months in prison after admitting the attacks in Edinburgh’s High Court in June last year.
But it emerged he died last week while in custody at HMP Shotts in Lanarkshire after serving just over a year of his sentence, daily recording reports.
The cause of death is unknown but an investigation into a fatal accident will be held as he died in police custody.
During his trial, the court heard how Wise entered the Clackmannanshire store and asked what time it closed before leaving.
He returned to the post office later with a beanie and scarf partially covering his face and shouted, “Give me the fucking money.”
Police then discovered a mailbag in a wood with open packages strewn about as well as a scarf, hat and knife.
They also found a lemon-shaped bottle in the store and its liquid contents were medically examined and identified as ammonia.
Two days later he robbed a store in Stirling with a knife before running away with £ 794 before being found by police hiding in a friend’s closet.
A statement from the Scottish Prison Service said: “Graham Wise, 42, a prisoner of HMP Shotts died on September 23, 2021. He was sentenced by the Edinburgh High Court in 2020.
“The Scottish Police have been notified and the matter has been reported to the Tax Prosecutor. A fatal accident investigation will be conducted in due course. “