Lois & Clark - The New Adventures of Superman

When Lois and Clark are decorating their new house, a former Lois' informant calls and tells her to go to a park, then he will show her how a murder happened. When he puts the gun on her hand to show how the crime happened, a former professor that Lois sent to jail years ago makes the gun shoot, killing Lois' informant, and she is caught with the gun. Now, Lois is arrested and being accused of homicide.