(credit: Denver Police)

(credit: Denver Police)

DENVER (CBS4) – Police have arrested a suspect but still are looking for help identifying others who attacked a man at a light rail stop in Denver last month.

According to police, the group beat and robbed a 23-year-old man of hundreds of dollars at the station at 30th and Downing in the Five Points neighborhood on Sept. 18. RTD said they alerted police that the attack was happening.

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Police arrested Daishawn Matthews, 18, a few blocks away from the incident that night and have another person of interest in the case. They are still looking for four other suspects.

Daishawn Matthews (credit: Denver Police Department)

Daishawn Matthews (credit: Denver Police Department)

“Eyes and ears in this community, so we certainly want to use the community,” Denver Police Chief Robert White said. “We want to use their eyes and ears to identify these individuals.”

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Police said they hope someone will know one of the other four suspects. They beat the man so badly he wasn’t moving when they left him behind. He was taken to the hospital with head injuries.

Some have questioned why police waited three weeks to release the video of the beating. White said they were trying to utilize the resources they had before going public, but the situation now has them re-examining policies and procedures.

“In hindsight we absolutely should have released this information earlier to the community,” White said. “The desire is to balance notifying the community with closing the case.”

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Police told CBS4 they have increased patrols at the light rail stop. RTD also said they have increased security.