|Cause of death:||
Shot by Alexander
Despite all efforts Oscar Shales continued to elude the authorities and Mahone, he was known to change appearance. For one year Mahone remained on Oscar Shales hoping to catch the killer soon enough. During mid June Oscar Shales was apprehended by Mahone and he could not bear the fact of handing Shales over to the authorities because he raped, tortured and killed women. Mahone killed him and buried him in his front garden under a bird bath. Mahone was discrete about this and told no one. Mahone and Pam Mahone then separated from each other, with Pam taking custody of their son, Cameron Mahone.
After Mahone was back in his office, he found a file about Shales. Mahone said Shales, and Mark Wheeler asked him what Shales had to do with it. Mahone said nothing and was then focusing himself on the Fox River Eight.
Mahone later discovered that Michael had found Shales in his backyard and Mahone looked in his backyard if the body was moved. A time later, in the Message video, Michael revealed that Mahone killed Oscar Shales, and also killed John Abruzzi, Tweener and Aldo Burrows.
Oscar Shales' files found by Mahone
After Shales death was revealed to the public, the charges held against Mahone were dropped by Paul Kellerman for helping Micheal retrieve Scylla.
- Oscar does mean "spear of the gods".
- Shales meaning is mysterious since it's unknown what it really means.
- David Apolskis's death is similair to that of Oscar Shales. Both men were shot in the chest death by Alexander Mahone.
- Oscar Shales along with Xavier Price both raped and killed women.