Leon

Leon was one of the two guards guarding the entrance to the Casablanca along with Conner. He was killed by shadow mercenaries in 2001.

Attack on the Casablanca
Ava Simmons and her mercenaries arrive in armored trucks and motorcycles at the Casablanca and gun down Leon and Conner. Then, Ethan Chapman rings the alarm, causing all guards to prepare for combat and Wes Roth and the Professor enter through the back entrance to help.