A 3-year old boy who was the subject of an Amber Alert on Wednesday night was found safe at a residence in West Jordan.
Detectives arrested the boy's father, Timothy Martinez, in his early 20s, after 9:10 p.m. The Amber Alert was issued about 8 p.m., Salt Lake County Sheriff's Sgt. Rosie Rivera said.
Authorities believe Martinez could have acted out on a threat to kill his son and then take his own life, Rivera said.
Chaseten Martinez's mother called 911 from the residence where she lives with Timothy and her son, near 2100 East and 7800 South. She apparently had an argument with Timothy Martinez. It was unknown where the argument occurred, Rivera said, but on the phone he threatened a murder-suicide.
Police took the threat seriously because Timothy Martinez has attempted suicide twice in the past, once with carbon dioxide and once with pills, Rivera said.
Radio and television stations broadcast Amber Alerts and highway electric signs described Timothy Martinez's 1992 Honda Civic.
People called authorities with sightings of the car, including two people who said they saw it on Bangerter Highway near Riverton, Rivera said.
Sheriff's detectives "sat on" a residence in West Jordan where an acquaintance of Timothy Martinez lives, Rivera said.
"We'll get him back to his mom very shortly," Rivera said after announcing the boy was found.
The Amber Alert was the first for the Salt Lake County Sheriff's Office. Rivera said it went well.
"It worked very quickly," she said. "Citizens assisted us."