Brennan Linsley / AP
Members of a crowd numbering tens of thousands smoke marijuana and listen to live music, at the Denver 420 pro-marijuana rally at Civic Center Park in Denver on Saturday, April 20, 2013.
Denver police on Monday interviewed but did not arrest a person of interest in connection with a shooting that wounded two people at a weekend marijuana rally.
Police called on the public to help identify a man in a YouTube video that was believed to have assisted the primary suspect after the shooting.
Denver police tweeted out a link to the video, asking the public to help identify the man wearing a brown and white checkered shirt casually walking away from the scene as the crowd quickly disperses.
A spokesperson for the Denver police told the Associated Press the man came to authorities voluntarily and spoke with detectives.
"He gave us some information, and we're moving forward with our investigation," spokesman Sonny Jackson said.
Tens of thousands of descended on Civic Center Park in downtown Denver to for the marijuana celebration held on April 20, or "4/20," a number that has come to be code for the drug's use.
The rally was one of many weed-related celebrations taking place throughout the state that voted to legalize the drug for recreational use last fall.
A man and a woman were both shot in the leg during Saturday's Denver rally, with both suffering non-life threatening injuries, according to police. Another person was grazed by a bullet and walked to a nearby hospital.
Authorities have turned to the public to assist in the investigation. Denver Police quickly utilized social media to ask the public for any pictures, videos or witnesses that may help finding the suspected shooting.
Police are looking for a man who was wearing a blue hat, gray sweatshirt and black pants at the rally. Denver's police gang unit is in heading up the investigation, though the Associated Press reported it is unclear if the shooting was determined to be gang related.