Corina Dawn Yardley, 44, who was the victim's girlfriend and who is Kruckenberg's mother, was initially held on $10,000 bail. Yardley is now being held in lieu of $50,000 cash bail.
The woman is charged with two counts of second-degree felony obstruction of justice for allegedly cleaning up the crime scene and helping the boys dispose of Campos' body by letting them use her truck.
All three defendants are scheduled for initial court appearances on the charges on April 23 in Moab.
Campos was shot three times in the head on March 25 as he slept in Yardley's bed at her trailer park home at 608 River Sands Road, according to a jail probable cause statement.
Nelson was allegedly persuaded to fire the gun by his friend Kruckenberg, according to information received by the Grand County Sheriff's Office and included in the probable cause statement.
Investigators also found evidence that Yardley removed the mattresses and bedding from the scene and bought a new mattress shortly after that, according to jail documents.
Nelson was allegedly persuaded by his friend, Kruckenberg, to kill Campos.
An informant to police that Nelson claimed that on the day of slaying, Kruckenberg had contacted him saying Campos was asleep and asking Nelson to come over, according to jail documents.
Nelson claimed that Kruckenberg said, "Let's kill him," but that Kruckenberg could not do the killing and asked Nelson to do it, according to the jail documents. "[Nelson] said it was not his deal, but was talked into doing it," the jail documents state.
Nelson then told the informant how he pointed the gun through a crack in the doorway of Yardley's bedroom and shot Campos three times, according to jail documents.
No motive for the homicide is revealed in the jail documents.