Police are asking for the public's help in finding the man who opened fire in a crowded Denver "pot rally" over the weekend. The festival, known as the "4/20 Pot Rally," hosted thousands of people, all of whom began running for their lives after the gun shots rang out.

Several minor injuries were reported resulting from the stampede that took place as people fled, and all other festival-related events for the weekend were canceled after the incident. Police say they've identified a suspect.

Saturday's festival was the first of its kind in the state since Colorado legalized marijuana.