Click here to take a fun quiz about the original run of Dexter! He is the captain to Miami Metro Police Department 's homicide division during Sergeant Harry Morgan's later years in the department and when Dexter Morgan first arrives as an intern for the forensics department. He at first appeared to have a strong stance against homicide and lead his detectives with a coaching mentality; demanding results and heated when cases hit a standstill.
He is later revealed to be the Masked Kidnapper behind the death of Jimmy Powell as well as the abduction and mutilation of his own son Nicky Spencer. Aaron Spencer is the first Main Antagonist of the series and Dexter's first major target - being connected to Spencer via his work and his father. Deeply unnerved over the Cartel's foothold in Miami and how the city was overflowing with cocaine Their efforts to flip the Colombians within the organization to aid in taking down Estrada were met with failure so he wanted to try a different approach - someone street level that Harry and Bobby could build up, someone they could trust Harry and Bobby pursued a smalltime dealer named Joe Driscoll , busting him for possession and carrying a firearm They attempted to leverage the charges against him so he'd work for them but his refusal, ontop of being a junkie himself, resulted in Harry choosing Laura instead Harry reports these efforts to Spencer, who approves of using Laura for this purpose but that if anything goes wrong that it's on him At some point Aaron met and married Becca Spencer , to which they later had one son named Nicky Spencer.
Aaron was close with his son for some time until his devotion to his job created strain in their relationship especially following his promotion to Captain and as Becca put it he chose Miami Metro Homicide as "his family" as opposed to his wife and son. He used to take his son to the Arcade every weekend up until this promotion and spent a lot of time with Judge Powell ' s family with their kids playing Little League together. Eventually Becca started seeing a man named Nelson during their marriage and this led to their divorce, which furthered the rift between Aaron and Becca leading to constant fighting that Nicky had to cope with by spending time playing his video games.
Under the guise of Captain Aaron Spencer he runs a tight ship with his homicide detectives at what he calls "The Ranch" a nickname for the Homicide Department , demanding answers from his men when hunting down killers but reserves himself to allow his forensic team led by Tanya Martin to do their jobs efficiently. He appears to have deep respect for Harry Morgan, who served under him when he was a Lieutenant in Vice pursuing the Estrada Organization and to this day holds belief that the Cartel seeks payback for their efforts putting them away.
Aaron, like the rest of his department, enjoys cutting back and bantering with his colleagues though he can jump into a serious focus when the time calls for it. Despite his aggressive push towards the murders of children and families he does not possess the same gusto in regard to what he refers to as "N.
