Vashon resident Brian Dublin, a man whom King County prosecutors describe as a serial rapist, was convicted Thursday of two counts of first-degree rape, one count of attempted first-degree rape and three counts of burglary in King County Superior Court.

He faces a minimum sentence of 37 to 48 years and a maximum sentence of life in prison. Sentencing is scheduled to take place Oct. 21.

Dublin, 28, a 2000 graduate of Vashon High School, was arrested in May 2010 and charged with the January 2010 rape of a 16-year-old girl and the October 2003 rape of an 18-year-old girl. Charges were later amended to include the attempted rape of a 12-year-old girl in July 2006.

In all three incidents, he entered the girls’ ground-floor bedrooms through unlocked doors and made harsh, obscenity-laced threats to the victims, suggesting he’d come back and hurt them or their families if they told anyone.

But in a 36-page brief that prosecutors filed last month, they outlined several other alleged assaults on Vashon. All told, they contend, Dublin raped or attempted to rape seven girls and women over the course of a decade — in some instances allegedly using drugs and alcohol that caused the victim to black out.

“In addition to breaking into homes and using fear and surprise as a weapon to commit sexual attacks, Dublin has also used more subtle means — either alcohol or something more nefarious — to commit his assaults,” deputy prosecutor Sean O’Donnell wrote in the brief.

The jury, however, was unable to reach a unanimous verdict on charges involving a fourth victim, a 16-year-old Vashon girl whom he allegedly attempted to have sex with after she became violently ill from alcohol. The prosecutor’s office did not bring charges on the other alleged incidents, instead using them in their brief to paint a picture of Dublin’s decade of crime and assault on Vashon.

Dublin is being held in jail until his sentencing next month, which will take place before Judge Laura Middaugh. The father of one of the victims said his family was feeling a sense of relief about the verdict.

“We’re very happy,” he said.