A state agency has forced out the head of the Minnesota Security Hospital in St. Peter. The Minnesota Department of Human Services said Tuesday that David Proffitt has resigned as director of the state’s largest hospital for the mentally ill and dangerous at the agency’s request. Proffitt had been hired last August, but had come under criticism in recent months for allegedly creating a hostile work environment. The Human Services Department opened an investigation into the allegations last December, and found that claims Proffitt created a hostile work environment or harassed any employees were unsubstantiated, although he was loud and intense during staff meetings. Staff members complained that Proffitt yelled, pounded his fists and made inappropriate remarks. He was reportedly terminated because of an inability to communicate with staff. Proffitt has said he hopes to remain employed at the Department of Human Services in a different position.