U.S. Attorney General Loretta Lynch says she is "appalled and deeply saddened" by the killing of an Ohio policeman by a man who's accused of targeting an officer.

In a statement Tuesday, the nation's top enforcement officer expressed sadness at the death of Danville Officer Thomas Cottrell Sunday night, as well as the recent shootings of officers in Utah and Philadelphia. She says they are reminders of the dangerous nature of the job.

Thirty-two-year-old Herschel Ray Jones is being held in the Sunday night slaying of Cottrell in the village 60 miles northeast of Columbus.

Knox County Prosecutor Chip McConville says an autopsy was being performed Tuesday.

Jones is being held on a probation violation. McConville says Jones will be charged with murder, but he doesn't know when.