By Anica Padilla

DENVER (CBS4) — Friday brought another delay in the case of a former security guard accused of killing a protestor in October. Matthew Dolloff is charged with second degree murder in the shooting of Lee Keltner, during a patriot muster rally. He was working as an armed guard for 9 News at the time.

Matthew Dolloff (credit: Denver Police)

Dolloff was supposed to enter a plea Friday morning — but that was again delayed after his attorneys asked for more evidence from prosecutors.

Dolloff is expected to claim self defense.

Anica Padilla