It's believed to be the second such swap at Norway House Indian Hospital in northern Manitoba in 1975.
'If I've lost my ability to help Maine people, maybe it's time to move on,' he said.
Justice Department lawyers are investigating police officers' interactions with the mentally ill.
Officials say more cases could emerge.
Kaepernick is famous for his scrambling in football, but he has not dodged the controversy generated by his decision to sit out the national anthem.