Police found Squire's body Sunday in his hotel room in Eureka, Missouri. He died of a self-inflicted gunshot wound.
Minutes before, officers conducted a random check on license plates in the motel parking lot and found a car registered to a 20-year-old from suburban Chicago who had been missing for two weeks. But, motel records showed squire was driving the car.
The officers attempted to talk to him but failed.
"He asked the manager if they would come to the door of the room and open it for them. And he and another officer assisted the manager in opening the door. The chain prevented them from opening the door all the way. At that time they heard a single shot," said Chief Michael Wiegand of the Eureka Police Department.
Police say that Squire lured Justin Newman to his northwest suburban home with a promise of a construction job.
Squire allegedly killed the younger man, set his garage on fire to cover up the murder and fled.
Police are talking to Squire's wife, but no charges have yet been filed in the case.