In early February 2014 a domestic dispute ended in multiple deaths after Sherri Pachello went to the Frederick home of her son-in-law, Cimmeron Johns, to pick up her daughter, Alisha Johns. The couple had a history of marital problems and prior domestic violence, and concern for the daughter’s safety prompted Pachello’s visit.

Witnesses saw Cimmeron Johns chase the vehicle carrying his wife and mother-in-law. The pursuit ended in Weld County, where Sherri Pachello and Alisha Johns were found dead the next day. Authorities focused their search on Cimmeron Johns, who was later located in a Thornton apartment and barricaded inside a unit. A standoff followed and Johns died after an exchange of gunfire with officers. The investigation noted a recent severe assault on his wife, and a woman named Rosanne O’Donnell later pleaded guilty to assisting Johns after the murders.

If anyone has information about the events that led up to that chase or knew the victims, please share what you know with investigators.