Police have arrested a second person in connection with the death of a 16-year-old boy who was found intoxicated and unresponsive at a party in Orinda on Saturday, Contra Costa County sheriff's spokesman Jimmy Lee said Tuesday.
On Monday, police arrested a 16-year-old boy, whose name is not being released because he is a minor. He was released to the custody of his father.
The arrest comes a day after Orinda police arrested 18-year-old Orinda resident Patrick Gabrielli on suspicion of contributing to the delinquency of a minor and providing alcohol to a person under 21 years old, Lee said.
Orinda police and emergency medical personnel on Saturday were called to a home in the 100 block of Hillcrest Drive at about 11 p.m., where they found the Orinda teen, Joseph Loudon, unresponsive.
A large party had been held at the house, Lee said.
Loudon was taken by ambulance to the Kaiser Permanente Walnut Creek Medical Center, where he was pronounced dead at about midnight.
An autopsy was conducted Tuesday, but the cause of death is pending results from toxicology tests, Lee said. Results from those tests usually take six to eight weeks.
Gabrielli, also a student at Miramonte High, was booked into jail and has since posted bail, Lee said.
Gabrielli's father, who lives in San Francisco, told the Chronicle that he does not think his son played a role in handing out the alcohol.
"I doubt highly that if there was alcohol, that my son provided it," Patrick Gabrielli II said. "I don't think he knows how to buy alcohol, much less drink it."