Dr. Caselli is a doctor at Belle Reve who has access to high-security floors.
Season Six[]
Lex Luthor paid him to authorize transfers of dangerous metahumans to his Level 33.1, but his role was discovered by Chloe Sullivan. She arranged a meeting and questioned him, and he attempted to shoot her to silence her. She was saved from him by Bart Allen and he was arrested, but Lex coordinated his release shortly afterward and presumably, the incident was covered up and he continued to work for Lex.