GREENWOOD, Mo. (AP) — A Missouri police chief is on administrative leave amid an investigation into allegations that he used excessive force against a father accused of trying to drown his 6-month-old in a pond.

FBI investigators visited the baby’s father, Jonathon Stephen Zicarelli, on Friday in the Jackson County Jail, where the 28-year-old is being held on an assault charge. His attorneys, Tom Porto, says they’re investigating Police Chief Greg Hallgrimson, who’s been on leave since Dec. 26.

Charging documents say Zicarelli’s daughter was rescued nine days earlier after he showed up at the Greenwood Police Department and said he had drowned her. Porto declined to describe what happened to Zicarelli after his arrest.

Hallgrimson said Monday that his attorney told him not to discuss the matter.