Colorado 4/20 Celebration
A 4/20 celebration in Denver last year 7 News

Denver police have identified a suspect they believe helped the shooter at the city’s 4/20 pot rally evade authorities.

Brandon Morse, a Denver political activist and blogger, shot a YouTube video that police later said showed the suspect running and then casually walking to blend in among the large crowd that gathered in the city’s marijuana rally at the downtown Civic Center park Saturday around 5 p.m. local time.

Three people were shot and injured during the rally as celebrants scattered amid the gunshots.

The Denver Police Department identified a man shown in Morse’s video as a suspect in the shooting. They believe the man, seen at the beginning of the YouTube video above, helped the main shooter evade capture.

"We are seeking this individual as we believe he assisted the primary suspect after the shooting,” Denver Police Department spokesman Sonny Jackson told the Denver Post. “He is the black male with a brown-and-white checkered shirt between the male in the red shirt and the male wearing the white hat.”

A second suspect, described as a black man wearing a gray hoodie and light blue baseball cap, is also being sought, according to the Associated Press.

The police have yet to make any arrests in the 4/20 pot rally shooting. The investigation is being headed by the department’s gang unit despite any evidence that gangs may have been involved, the Post reported.

“They have their eyes and their ears to the ground and take care of this sort of thing,” Jackson said.

Witness Andrew Lindsay said he believed the shootings were gang-related. He told the Post he walked by two men “coming aggressively through the crowd” when he heard the shots.

“It was absolutely gang-related,” he told the paper.

Jackson urged the public to come forward with any information on the suspects.

"When gunfire happens, people run away. Now that things have calmed down, we would like them to come back and talk to us," Jackson told AP.

Another Denver 4/20 pot celebration spectator, Alexander Pringle, took photographs of the shooting. He told the Post that he observed what looked like a fight before mayhem ensued.

“Then this guy came up and started shooting at people,” Pringle, 28, told the paper.