CENTENNIAL, Colo. (AP) -- A newly-released investigator's report says Broncos receiver David Kircus told another man -- quote -- "You don't know what I'm capable of" after Kircus allegedly punched him in the face.

Kircus faces a second-degree assault charge after an altercation at a party in Centennial last Sunday, but prosecutors added a second count -- violent crime -- as a sentence enhancer.

That could lead to a stiffer penalty if he's convicted.

An Arapahoe County sheriff's report made public today said Kircus had been asked to leave the party, and the alleged victim escorted him to the sidewalk.

The report said Kircus pointed out they were no longer on private property and hit the other man in the eye, causing multiple fractures.

Kircus is free on six-thousand-dollars' bond.

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He could face two to six years in prison if convicted.

Meantime, District Judge Anne Ollada granted a request from Kircus' attorney to change the terms of a restraining order against Kircus so he can travel out of state this weekend.

She also agreed to remove a provision that barred Kircus from drinking alcohol -- but said it could be re-imposed.

Kircus is a backup receiver and return specialist who joined the team last season. He had nine receptions for a team-leading 20-point-eight yards per catch, and returned six punts for a 14-point-three-yard average last year.

Broncos coach Mike Shanahan is waiting to see how the case develops but said -- quote -- "Obviously, if he didn't handle himself the right way he won't be with us."

(Copyright 2007 by The Associated Press. All Rights Reserved.)