Continuity mistake: Michelle Thomas, Ben Matlock's assistant, has been abducted and is being kept in the home of mobster Jay Cutler. Ben attempts to scale the wall surrounding the property. A close-up shows him with both arms resting atop the wall. In the very next shot, his arms are extended, his right leg is over the wall and he is raising his left leg.
Continuity mistake: Matlock is inside a jail cell, speaking to a man who has been accused of murder. In an outdoor scene, someone throws a raw egg at the window as Matlock looks out. Inside the cell, as Matlock turns away from the window, the splattered egg has vanished.
Answer: I did not see this episode, but YES. Both prosecution and defense lawyers use investigators to search for and uncover evidence that is legally admissible.