Revealing mistake: When Melinda goes to Justin's dorm room to speak to him after he dies, the camera pans to his body on the bed and you can see that it's a body double. (00:24:50)
The Walk-in - S2-E17
Revealing mistake: When Jim and the mortician are about to transfer the dead guy from one table to the other, his arms move slightly.
Answer: This "spirit" appears in several episodes throughout the rest of the season including the season finale. He's a "bad spirit" that is intent on keeping souls trapped on Earth. With the death of Andrea (her business partner) he wanted to make a deal with Melinda, to give him HER soul to release everyone else including Andrea to cross over.
Boobra