McALESTER, Oklahoma - The trial of a man charged with killing his 21-month-old daughter more than three years ago is scheduled to be to begin this month.

Court records show Devin Sizemore's trial on charges of first-degree murder and assault and battery on a police officer is set for Monday, September 10th.

Prosecutors say police found Sizemore on July 15, 2015, standing near a pond in Krebs and his daughter, Emily Sizemore, floating in the pond. Police say Devin Sizemore fought with them as they pulled the girl's body from the pond and arrested him.

Sizemore was found competent to stand trial. Defense attorneys have indicated they will offer an insanity defense.

A gag order has been issued in the case and numerous documents, including the girl's autopsy report, have been sealed by the court.

The Associated Press contributed to this report.