Richard Sanchez, 60, was shot and killed on a Denver city bus one cold January evening while returning to his daughters and grandsons. Police say a verbal dispute began over Sanchez’s leg blocking the aisle and escalated when he confronted a group of teenagers at the back of the bus. Surveillance footage reportedly shows a 13-year-old pull a handgun and fire multiple shots, striking Sanchez. He was taken to a nearby hospital and pronounced dead; another passenger suffered a minor injury that did not require hospitalization.

Denver police identified the suspect using school and surveillance records and arrested the 13-year-old five days later. He was charged with first-degree murder and other counts; later pleadings resulted in a guilty plea to second-degree murder and attempted first-degree murder, with a sentence of five years and six months in the Division of Youth Services. The case of a 15-year-old brother implicated remained in juvenile court. Sanchez’s family said they were not notified until they had reported him missing days after the shooting and remain devastated by his death.

Did anyone on that bus, or who knew Richard’s routine, see anything that could help clarify what happened in those last minutes?