The next day they meet Lassiter and Juliet at the cemetery as they exhume the body of Wyles III, whose son Wyles IV is not happy about his father's eternal rest being disturbed.  The cops got the coroner's report back on Hastings, who was strangled to death by a hand wrapped in cloth, transferring 3000 years old spores to the body, implicating the mummy in the murder.

Shawn goes to Henry for advice on how to track down a suspect that doesn't exist any more.  Henry suggests he back trace his target's steps and then tries to talk to him about something important but Shawn rushes off, saying he'll come back later.  

At the police station, Lassiter is watching a news report on his case.  Wyles III was originally thought to have been alone in the house and fallen down the stairs but a maid recently came forward to say she heard him in an argument that night.  An old photo of Wyles III standing at the top of his staircase in front of trophies and his antique gun collection is shown.  Meanwhile, Shawn has tracked the trail of the mummy exhibit across the States and to the museum warehouse, everything being fine until the day when it got up and walked out.  They need to check out its last stop, the warehouse.  They question the foreman who seems distracted but tells them the mummy was processed like everything else – it showed up, a museum rep did an inspection, then it went out on the floor.  Shawn then looks out the door up the hill and sees a girl carrying the camera he saw away.  He and Gus track her down and she tells them she's a film student doing a time-lapse project and the museum happens to be in her shot.  They go with her to her editing room where she shows them the footage of the mummy walking out of the museum and driving off in a white van, a van Shawn remembers seeing in the parking lot of the museum warehouse.  They head back to the warehouse and see the van take off, giving chase until it crashes into a tree in the woods.  When the go over to investigate, they find the mummy crumpled over in the front seat.

They go to the police station to get Lassiter to come check out the van, but he says he's got a break in his case.  The autopsy on Wyles III showed he died from trauma to the head before he fell, lodging a tiny chip of ivory in his skull.  Lassiter tells Shawn the only reason he got involved in the museum case anyway is that Wyles IV is on the board of directors and he thought it would be another way into his own case.  With that, Shawn has solved both cases at once and takes everyone to the museum where he puts it all together.  Wyles IV killed his father with the pistol then put it back in the case, which his father had bequeathed to the museum.  When he saw in the paper that the case was being reopened, he had to retrieve the pistol with the evidence on it.  So he put off the overhaul of the security system, then with the help of the museum foreman, he dressed as a mummy and waited for the museum to close before he got up and tried to break into the pistol case.  Hastings surprised him, so he killed him and ran out, setting off the alarm and leaving the pistol behind.

Back at the police station, Vick is saying her good-byes when she gets a call from the mayor.  It turns out, his candidate to replace her was caught in compromising photographs with a woman who was not his wife and is now begging her to stay.  Just then McNab walks in with the paper open to the incriminating photo – it's the man and woman Shawn was tailing at the beginning.  With everything wrapped up, he finally has time to go back and finish that conversation with Henry, but before Henry can get out what he's trying to say, there's a knock at the door.  Shawn opens it and a look of shock crosses his face as he says just one word, "Mom?"

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