The Alberta Serious Incident Response Team, also known as ASIRT, says it was called in last summer to investigate the actions of the officers from the Medicine Hat police force.
ASIRT says they were investigating an assault complaint Aug. 25 and arrested a 34-year old man. He was injured while being taken into custody and required hospitalization and surgery.
Constables Robert Angstadt, David Hrycyk and Mark Seiller have been released from custody and are to make their first provincial court appearance July 30 in Medicine Hat.
Police Chief Andy McGrogan said Thursday he has reassigned them to other duties until the charges are dealt with.
"This process which started over 10 months ago could still take another 18 months to conclude," he said. "It is important that the members continue to contribute to the safety of the community."
McGrogan said he doesn't believe the officers pose any kind of danger to the public.
"If I thought there was any public risk to keeping these members on duty, there's no way they would be on duty. At this time, I support the officers and believe that they will continue to function."
He pointed out that the constables have never been accused of anything like this before or since last August.
"I have to go on the fact that they've been working on the street since this incident happened ... (and) that there's been no other conduct issues since then. Their records in the past are clear and the reputations of these police officers are solid."