Two years after Matlock (1986) was canceled, Andy Griffith reprised the role of Ben Matlock on a two part episode of this show. This would mark his final appearance in the role, and the only time the Matlock character was seen on CBS. In the episode, it is explained that Dr. Mark Sloan advised Ben in 1969 to invest his life savings, $5,000, in the 8-track tape industry. When Ben lost all of his money, he began buying cheap suits off the rack and eating hot dogs because they were all he could afford. By the time he had money again, it was a habit.
We see Dr. Slone constantly ask his detective son to put out APB's (All Points Bulletins) or BOLOs (Be On the Look Out) to bring suspects and witnesses in. When found the police just walk up to people and place them in the squad car, taking them to the station for Steve and Mark to interview even though it's pretty clear they didn't want to come. If there is no probable cause for an arrest or an active arrest warrant, the police can't make you go anywhere against your will. Once in a while, a wealthy or educated person will assert this and ask a lawyer to be present but this is rare.