Update: The body found has been confirmed to be Riley Crossman, Sheriff Bohrer said it was confirmed around 7:30 p.m. May 22. 

Andy McCauley, the boyfriend of Riley Crossman’s mother, now faces a first-degree murder charge in the death of the missing 15-year-old girl, and police say he gave inconsistent versions of his alibi during the eight-day investigation.

Cadaver dogs also picked up the scent of a dead person in McCauley’s truck, leading police to the decomposed body, according to court records. The body also had dry wall mud on the shoulder that was matched to dry wall mud in the bed of McCauley’s truck, police said. They are now awaiting the results of an autopsy to determine that the body is Crossman’s. 

[RELATED: Investigation continues into murder of 15-year-old Riley Crossman]

On May 8, Riley Crossman’s mother, Chantel Oakley, said she went by Riley’s room around 7 a.m. but didn’t see her there, according to charging documents. Investigators said it wasn’t until Riley’s school sent Oakley a text message around 6 p.m. that she realized Riley had never made it to school, and then reported Riley missing at 6:04 p.m. 

During the investigation, McCauley, 41, originally said he drove his Dodge work truck to his job as a construction worker, police said. However, during the interview, he allegedly said that he does not have a driver’s license, and doesn’t typically drive. 

Court records show he then told police he left his job site to buy drugs from people he did not know at the Eagle Plaza store. The story later supposedly changed, and McCauley said that he went to his home in Berkeley Springs to get cocaine.

There were also alleged inconsistencies about how McCauley took the drugs. According to charging documents, he stated that he only sniffs cocaine, but later told police he went to the house to shoot his drugs with a needle. 

McCauley also allegedly said that he traveled east on Route 9 to his job site, but police say video surveillance shows that he was actually on Apple Harvest Drive around 12 p.m. on May 8. Video surveillance also shows McCauley leaving the construction site around 9 a.m. and returning at 1:41 p.m., police said.

Based on this information, police arrested McCauley for Crossman’s death. His preliminary hearing will be held on May 24 at 2 p.m.