The actor – who played Xander Harris in the hit series – was taken into custody in New York on Wednesday evening (30 September) following an alleged row with his girlfriend.
According to The AP, police have said Nicholas is accused of attempting to choke his girlfriend at a hotel. She has alleged she was returning items to the actor but when she tried to leave he took her car keys and mobile phone.
Officer Bill Jinson of Saratoga Springs Police Department has said: "It sounds like it went downhill from there. He allegedly grabbed her by the throat and started choking her."
Nicholas, 44, has been charged with robbery, obstruction of breathing and criminal mischief.
He was released on Thursday on $20,000 bail.
The actor has yet to comment on the allegations.
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