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.
Continuity mistake: Julia's hands go from being on her accomplice/boyfriend's cheeks to around his neck, then back to his cheeks in one shot.
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.
Answer: If it was ever found out that she was at Terry's house before he was killed, there's a possibility that a lot of people would have begun to suspect her of murdering Terry. By claiming that she wasn't, she was hoping that people wouldn't accuse her of the murder.