Soto was last seen in Albuquerque, New Mexico on June 19, 2009. He was driving a red 2002 Chevrolet Tahoe with New Mexico license plates numbered 502PJC at the time. He told his wife he was going to a friend's house to collect money owed to him, and never returned. His cellular phone was last used at 11:30 a.m. that day. He has never been heard from again.

Soto's vehicle was found on the Pajarito Mesa in Valencia County, New Mexico at noon the same day of his disappearance, but no clues as to his whereabouts were found at the scene. Authorities questioned the friend he was supposed to meet the day he went missing, and stated the man isn't a suspect in his disappearance. Soto's friend said he did see Soto that day and paid him.

Soto raises racehorses and frequently attended local horse racing events. He also owns an auto detail business. It's uncharacteristic of him to leave without warning. He left behind a wife and a young son. His case remains unsolved.