In 2015, when DeAndre was 12, his older brother joined the Marines, and left the family. This was the same year that his Father went to help the Ferguson Police contain the riots, the year his father was killed in the line of duty during the riots. That was also the year that DeAndre and his sister moved in with his aunt, and joined a money gang in his hometown of Detroit. He always seemed smarter than his posse, and often was the reason his crew wasn't caught. His crew took to calling him "Ol'boy".
At 14, his gang forced him to drop out of school, so before it was too late, he got his GED and made it look like he graduated 3 years early. That summer, his older brother came back from his first tour of duty, and convinced Ol'boy to move to San Diego with him and take their sister. When he moved, Charles(older brother) helped enroll DeAndre at UCLA on a scholarship. Being one to cover all his bases, DeAndre played the gang and got his gang leader's blessing to leave for California.
DeAndre got his B.S. in Forensic Psychology, and minored in foreign language with Russian being his primary. He later learned Arabic after he joined the Marines. At 19, he graduated from college Summa Cum Laude and Was commissioned to the USMC.
Two years into his service, he watched his brother get killed on leave by a gangbanger in L.A., and Ol'boy came unhinged. He began his mental descent by joining force recon, then ultimately the SEALS. When he was assigned to a team, they began to see his dissociation while on missions. What they hadn't seen was that he'd developed the Eidetic memory power, and he had been reliving his brother's death every morning. When the Marines finally discharged Cpt. DeAndre Holmes, the reason was filed as Medical: PTSD. While this was correct, it was only half of the actual story.
After 3 years of extensive therapy to deal with the loss of his Mother, Brother and Father, DeAndre joined The DPD Gang unit under the supervision of his Father's old partner. Later that year he applied to the SWAT team and passed with flying colors, but because of his experience in the USMC and Navy SEALS, they assigned him to the newly formed HICU elite task force.