Robin Blasnek, 22, was walking to her boyfriend’s home in Mesa, Arizona on the night of July 30, 2006, when a single gunshot was fired at about 11:15 p.m. Neighbors found her wounded; she was taken to a hospital but soon lost consciousness and died of her injuries.

Investigators linked her killing to a string of random late-night attacks across the Phoenix metropolitan area dating to May 2005. Those incidents, attributed to a so-called Serial Shooter, targeted pedestrians and bicyclists after dark and included dozens of shootings of people and animals that left multiple dead and injured. Forensic evidence and the similar circumstances of the attacks tied Robin’s death to the spree.

Four days after Robin was killed, two men — Dale S. Hausner, 33, and Samuel John Dieteman, 30 — were arrested at their Mesa apartment after surveillance. Authorities say they found weapons and a map marking shooting locations; Dieteman admitted participation in some of the crimes. Both were charged with two counts of first-degree murder and numerous counts of attempted first-degree murder.

Did anyone in Mesa at that time see Robin that night or notice suspicious activity in the neighborhood?