An investigator’s report blames a treatment team for the botched release of a violent patient at the Minnesota Security Hospital in St. Peter last year. The patient was discharged last summer and dumped at a homeless shelter in downtown Minneapolis. The Minnesota Department of Human Services brought in an outside investigator to unravel the episode. According to the investigator’s report released Wednesday, the hospital’s “chaotic” conditions also contributed to the lapses. The investigator concluded that hospital staff responsible for the man’s care failed to work in tandem while operating “under enormous pressure” and without any checks and balances. The security hospital is Minnesota’s largest psychiatric facility and home to nearly 400 of the state’s most dangerous psychiatric patients.