Last night the Powell familys solicitor Errol Robinson rubbished the claims, describing them as typical.
He added that he had written to Chief Constable Paul Scott-Lee, demanding that all the officers involved in Mr Powells arrest be suspended immediately.
Mr Powell collapsed at Thornhill Road police station shortly after his mother had called police to her home because her son was behaving erratically.
The father-of-three was rushed to Birminghams City Hospital where he died in the early hours.
An initial post mortem examination into Powells death proved inconclusive but did establish that he did not die from asphyxiation or multiple injuries.
It is understood that a second independent post mortem conducted last week will challenge the original findings.
Last week Birmingham coroner Aidan Cotter opened and adjourned an inquest during which he requested that the hearing be concluded in six months.
He reiterated that nothing in the first examination suggested the arrest procedure was the cause of death and that Powell had no significant injuries from being struck by a vehicle.
Mr Cotter also confirmed that Mr Powell did not suffer from any diseases although there was a slight degree of cardiac failure. After the hearing Mr Powells grieving partner Marcia Williams said she had asked for a speedy inquest so that she could tell the couples children exactly how their doting father had died.
All we want is justice so we can be told how he died and why, she said.
