Lamar Roberts, one of the two teenagers implicated in the death of seven year old Zoe Garcia » 8/15/08 6:00pm 8/15/08 6:00pm, entered a plea of "not guilty" today, according to Colorado's 9 News. Roberts, who told police that Garcia's death was the result of him and Heather Trujillo recreating moments from and claimed to be drunk at the time, is…