Christopher Serna. Credit: Collier County Sheriff’s Office. It’s one of the most gruesome crimes we’ve ever covered: A man is convicted for stabbing his girlfriend more than a hundred times and sticking her head on a spike. Christopher Serna Tuesday appealed the plea deal he already took in the case against him for the killing of his girlfriend Suzanne Bishop in 2011, and it will be reviewed by a judge Wednesday. Christopher Serna. Credit: Collier County Sheriff’s Office. Serna, who is now 44 years old, took a plea deal in the killing of his girlfriend at a North Naples apartment complex in 2011. Serna says he learned in 2019 the state offered a 25-year plea deal before he took his 50-year plea deal. He says he never knew about that previous deal and claims his counsel never advised him either. Bishop’s death is remembered as one of the most graphic murders in Collier County history. Investigators walked into a home on July 26, 2011, and saw a severed head on a spike, scattered body parts throughout the apartment, and a body in a pool of blood. We tried to reach out to friends and family of Suzanne Bishop about the appeal and were not able to get in contact with them. Serna is scheduled to appear in court at 9:15 a.m.