Twenty-six-year-old Capt. Jack Casey was one of five Marines killed in a helicopter crash during a training exercise on Feb. 7, 2024, near San Diego, California.

Marine Capt. Jack Casey, born and raised in Dover and a 2015 St. Thomas Aquinas graduate, was a CH-53E helicopter pilot who died with four other Marines while on active duty on Feb. 7, 2024.

Marine Capt. Jack Casey, born and raised in Dover and a 2015 St. Thomas Aquinas graduate, was a CH-53E helicopter pilot who died with four other Marines while on active duty on Feb. 7, 2024.

The crash killed five Marines including Lance Cpl. Donovan Davis, 21; Sgt. Alec Langen, 23; Capt. Benjamin Moulton, 27; Capt. Jack Casey, 26; and Capt. Miguel Nava, 28.