Murphy, a retired U.S. Army colonel and wife of the president of Centenary University, was taking a daily morning walk in Hackettstown when she was struck and killed on Jan. 7.
The man sitting in a car moved the rifle he was holding and shot a dog sitting in the driver's seat. He continued to move it in the direction of one of the troopers.
Warren County Prosecutor James L. Pfeffier said Mark Van Grouw, 57, had sex on multiple occasions with a person between the ages of 10 and 15 between 1990 and 1995.