Alan is six feet tall with long, wavy black hair. In his mug shot, he's wearing a red shirt with a white undershirt.
Special Agent Frank Lundy gathers the team for a Bay Harbor Butcher Case presentation. At Lundy's request, Dexter checks through a folder, holding files for twelve additional victims that he newly identified from blood slides. Alan is one of them.
- On 12 March 2002, Matherson was arrested by Officer James Doakes on two counts of first degree murder.
- His last known address and birthday is the same as Buck Forester. (Writers likely used the same info.)
- In "Finding Freebo", there are discrepancies in Matherson's file. Examples include, he was born on 12 September 1961; his address was 1421 Edmont, Miami, 33130; and he was arrested on 12 April 2002 for one count of pandering.