Mary Louise Meixell-Moyer, 62, of Bethlehem, Pennsylvania, was shot to death on December 22, 2017. A neighbor reported seeing her bleeding on the front lawn, and police responding to the call encountered her son, Justin Kephart, who fired on officers. Reports say Justin shot Mary Louise multiple times before engaging in an eight-hour standoff during which he fired over 100 rounds at police.

Authorities found multiple firearms and drug paraphernalia in the home and noted Justin was legally prohibited from possessing guns because of a prior felony drug conviction; it is reported the weapons came from his father’s collection. Justin was later found dead at the scene. The next day, Mary Louise’s father, Dale Clark Kephart, was found dead in Allentown of an apparent self-inflicted gunshot.

Mary Louise worked as a waitress in several Lehigh Valley restaurants and is survived by her mother Rosemarie Meixell, her daughter Serenity Reni Andrew, and a sister, Rosemarie Meixell-Neith. What information might help explain how the deadly confrontation began?