Frank Potenza, a former New York City police officer and security guard who found a second career as a regular on his nephew Jimmy Kimmel’s late-night talk show, died early this morning. He was 77. Potenza, a Korean War veteran, joined ABC’s Jimmy Kimmel Live in 2003 as guard and cast member. Known as Uncle Frank, he was often paired in comedy bits with Guillermo Rodriguez, a real-life parking lot security guard for the show. He also did location pieces with his ex-wife, chronicling their stints on a diary farm, learning self-defense, etc. “Frank Potenza was beloved by his co-workers and considered an uncle to all,” JKL said in a statement. “His kindness and humor will be missed by everyone he touched.”