The Serial Shooter refers to what authorities now believe to be two men who committed multiple drive-by shootings targeting random pedestrians. The shootings occurred in Phoenix, Arizona, between May 2005 and August 2006, simultaneous to the search for the serial killer known as the Baseline Killer who was also committing random murders of brutality and sexual assault. Investigators believe the Serial Shooter(s) were responsible for eight murders and at least 29 other shootings in the Phoenix area (some reports put the number as high as 38 incidents).

The Serial Shooters' most recent crime occurred July 30, 2006 in Mesa. According to police, Robin Blasnek, 22, was shot and killed at approximately 11:15 p.m. while walking from her parents' house to her boyfriend's house. On August 3, Phoenix police released a statement linking Blasnek's murder to the Serial Shooter, citing forensic evidence and other similarities to the Serial Shooters' past crimes. Prior to that, they shot pedestrians, cyclists, dogs and horses. Phoenix police originally believed that the Serial Shooter was a single individual responsible for 4 murders and 25 shootings beginning in May 2005, and that a series of 13 shootings in the same area were the work of another offender. However, on July 11, 2006, investigators revealed that they believed the two series of shootings were related.

The Serial Shooter attacked from a vehicle without warning. The offender targeted victims who walked, biked or were otherwise alone outside, usually between 10 p.m. and 4 a.m. Victims appear to have been targeted randomly.