Matthew Leonard, 28, was booked in the Utah County Jail Saturday on two counts of aggravated murder and one count of obstruction of justice.

Based on evidence and witness statements, Leonard is believed to have shot and killed his mother, Sarah Johnson, of Springville, and John Handricks, inside Johnson’s home on March 20, according to a news release from Springville police.

The location of Johnson and Handricks remains under investigation, police said.

On March 26, Springville police took a missing person report for Johnson, who was last seen at her residence on March 19, and the Salt Lake Police Department later took a missing person report for Handricks, according to the news release.

Police said they contacted Leonard, who then filed a missing person packet to provide information for the National Crime Information Center listing of Johnson.

On April 6, police said they received information that Johnson and Handricks had possibly been shot and killed. Through an investigation, authorities learned that Johnson and Handricks were last seen with Leonard at the residence on March 20, and that a witness outside the home heard possible gunshots, the news release said.

Authorities obtained a search warrant for the residence on April 11, and located blood, shell casings and a bullet slug, police said. Leonard was taken into custody at a traffic stop with the assistance of the Provo and Orem Police Metro SWAT teams.

“Our hearts go out to the family and friends of Sarah Johnson and John Handricks during this extremely difficult time.  We are committed to pursuing justice and finding answers in the case,” Springville police said.