On January 16, police searched the home where Powell's mother Mistie Carlson lives with her boyfriend Lee Shepherd, her mother, Linda Powell, and her mother's boyfriend William 'Clubby' Larson after being alerted to them by a neighbor.
Details of that search became public on Monday when the search warrant obtained by police beforehand was unsealed in court.
The neighbor said they had seen Shepherd towing a car similar to the one Riley often drove on January 2, the day they were reported missing.
Police seized several items of property including a camouflage tie strap which they described as being 'identical' to one found in the driver's seat of the teenager's abandoned car.
Slash marks on their tires also appeared to have been made deliberately, police said. There was no tear in the side wall that would indicate that the tires where moving when punctured.'
The items they seized included drug paraphernalia and letters addressed to Riley's mother.
Riley's mother, grandmother and her boyfriend all gave voluntary interviews on January 15 but Shepherd, his step-father, refused to speak to police and instead left the house to go into a trailer on the property.
During her interview, Riley's mother Mistie said she had been at home on New Year's Eve with the rest of the family at a party.
Clubby, her mother's boyfriend, said she was not there at all and another guest who attended the event made no mention of her being there.
http://www.dailymail.co.uk/news/article-5358627/Missing-Utah-teens-murdered.html
