A suspect has surrendered to authorities in connection with an incident in which a man was allegedly robbed after being kidnapped in the Metro system and forced to ride the Green Line at gunpoint.

Metro Transit Police said Timothy Pernell Williams, 21, turned himself in Friday night and was facing charges of kidnapping and armed robbery. The surrender came days after a warrant had been issued for him in the Dec. 20 incident.

In that incident, Metro officials said a man was accosted at the Naylor Road station in Prince George’s County and forced to ride five stops to the Waterfront station in Southwest Washington.

The kidnapper’s gun was apparently covered by a sweatshirt as he and the victim rode the train, Metro spokesman Dan Stessel said.

At Waterfront, the two apparently left the station and went to two nearby businesses, where the victim was forced to make withdrawals at ATMs, Stessel said.

They then returned to the station, where the kidnapper and victim boarded separate trains, Stessel said. Metro later posted two surveillance photographs of a man they said they wanted to identify as part of their investigation.

Stessel said Saturday night that transit police followed several leads, which included information from the public, to get a name for the person seen in the surveillance video. After evidence was presented to a court commissioner in Prince George’s County, he said, an arrest warrant was issued.

On Tuesday, Metro posted a “wanted” poster via Twitter, saying that Williams was being sought in connection with a kidnapping and armed robbery.

A lawyer with the state public defender’s office for Prince George’s County said Williams, of Southwest Washington, voluntarily turned himself in at the county jail Friday night.

The lawyer, Jason Ricke, said Williams maintains his innocence and says he is not the person shown in the surveillance photos.

Williams’s position is that “he had nothing to do with this incident,” Ricke said.

Ricke said he expected a bond hearing to be held Monday.

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