Take a rather unconventional character like Cindy Lauper's Avalon and give them the power to tell you things they shouldn't know. As a loyal follower of the show, I find her character to be tiresome and ridiculous. And for the forensics people to eventually buy into this really detracts from the whole point. Sweets is dead and now she is speaking for him from the grave and finding things in his car and blah blah blah. The real psychic was the one who was being interrogated and couldn't answer anything without help. Aubrey showed him up. The case is of little importance as time is spent chasing ghosts.
Review of The Psychic in the Soup
