Dexter was born Dexter Moser on February 1, 1971, to Laura Moser and a man who would later start using the alias Joseph Driscoll. He had an older brother named Brian Moser.

Unfortunately, Dexter's mother was a drug addict. This never affected her love for her boys, but it put her at high risk with certain parties. She met Detective Harry Morgan and began acting as his confidential informant in the Estrada cartel, trying to provide information that would help bring down the drug kingpin.

On Oct