GRESHAM --- One man has been arrested for a February attack near an east-side MAX stop in February that left one victim with a broken jaw.

Video surveillance of three suspects on the MAX train led to the arrest. Christopher Alance Briggs, 18, was arrested Tuesday afternoon after a dozen tips came to police.

Watch: TriMet video 1 |Video 2

More than half the tipsters named Briggs as one of the three men seen in the video, according to Gresham police officer Adam Baker. Police contacted Briggs who voluntarily came in for questioning. The arrest followed that interview.

Briggs was accused of two counts of second-degree robbery. He was being held at the Multnomah County jail on $500,000 bail. The other two suspects have not been found.

The two victims in the attack talked with KGW in February, hoping it would help police catch the men who followed them from the MAX stop at E 172nd and Burnside.

More: Victims describe violent beating

Chris Putnam, 18, said three men jumped them from behind and punched him so hard that he blacked out.

I had my hands above my face, they were hitting me and they were pulling my friend s backpack off of him and punching him, said Putnam.

Jacob Kieper, 19, tried to fight off the men but both he and his friend were knocked to the ground. His backpack with iPod and laptop was stolen. Also in the pack were medications, eyeglasses and retainers only Kieper can use.

Investigators hope the public will watch the video again, recognize the other two men and call the Police Tip Line at 503-618-2719, where information can be left anonymously.

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