BOISE -- The former boyfriend of an Idaho teen who murdered her parents has been arrested after law enforcement officials say he sold a half-pound of methamphetamine to an undercover detective.

Bruno Antonio Santos-Dominguez, the former boyfriend of Sarah Johnson, is in Blaine County Jail in Hailey following his arrest last week.

Santos, who is 25, was once a suspect in the 2003 slayings of Alan and Diane Johnson.

Sarah Johnson, just 16 at the time, was subsequently convicted of two counts of first-degree murder and is serving two life prison sentences without parole.

Santos was arrested along with Jose Guadalupe Benitez-Diaz, a 27-year-old who was also charged Monday in 5th District Court with trafficking.

The Idaho Mountain Express reports both men may be in the United States illegally.

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