- This article is about the Scooby-Doo! Mystery Incorporated incarnation of the character. For the original incarnation of the character from Scooby-Doo, Where Are You!, see Mr. Carswell.
Carlswell is a middle-aged Caucasian male, with gray hair. He wears glasses.
In Alice May's flashback she watched him get taken away by the police. Alice May was depicted as a child despite the fact that she's supposed to be the same age as Mystery Inc.; in their own flashback they were unchanged and both of their flashbacks were presumably not far apart. This may be taken as a clue that her flashback was a lie, which turned out to be the case.
Scooby-Doo! Mystery Incorporated
Velma Dinkley thought that he was still in jail, and alive, at the time Alice May carried out new crimes, supposedly in revenge for his arrest. Alice May said she was his daughter, but he has no daughter.
- The flashback in The Legend of Alice May is substantially the same as in the Scooby-Doo, Where Are You! episode, Jeepers, It's the Creeper, but does not show that everything was the same, however, so little is known about his case in this continuity.