The former Owl who died after being Tasered by police had threatened to kill his father, it has been claimed.
Dalian Atkinson, aged 48, who played for Sheffield Wednesday in the 1989-90 season, was said to have been in a 'manic state' when a police Taser was used against him.
He later suffered a cardiac arrest and died.
The retired footballer's brother, Kenroy Atkinson, 53, said he had undergone dialysis for kidney failure in the days before the incident and was 'not in his right mind'.
He said his brother had attacked their 85-year-old father, Ernest, at his home in Telford, Shropshire, before police were called to the scene yesterday morning.
"My brother had lost it. He was in a manic state and depressed - out of his mind and ranting," said Kenroy.
"He had a tube in his shoulder for the dialysis and he had ripped it out and was covered in blood.
"He got dad by the throat and said he was going to kill him. He told dad he had already killed me, our brother Paul and sister Elaine and he had come for him. He was not in his right mind.
"We are all devastated. Our family is heartbroken."
The retired striker, who was working as a football agent, went into cardiac arrest in an ambulance on his way to hospital and medics were unable to save him.
The death is now under investigation by the Independent Police Complaints Commission.
West Mercia Police said Mr Atkinson was Tasered amid concerns 'for the safety of an individual'.
Mr Atkinson was a top-flight striker in the 1990s, starting his career at Ipswich Town then playing for Sheffield Wednesday and Spanish side Real Sociedad before moving to Aston Villa, Turkish side Fenerbahce and Manchester City.
He ended his playing career in South Korea in 2001.
His friend and former Sheffield Wednesday team-mate, Carlton Palmer, said he had struggled after his sporting career ended.
"It can be difficult for players when they finish and I know Dalian found it difficult," he said.
"When you finish as a footballer, all of a sudden at 34 or 35 you have no routine and no structure to your life, and that can be a major problem. It can be a very dangerous spiral and unfortunately that's what it was for Dalian."