After investigating for 500 hours, police Thursday said they've found no evidence of a crime, or any indication that 16-year-old Joseph Loudon's death was criminal.
Authorities found Loudon intoxicated and unresponsive at the party in May. The coroner ruled his death accidental.
Two people were arrested for furnishing alcohol to minors the evening of the party. Police now say another person may be charged on a similar charge.
CORRECTION: ABC7 erroneously reported that 19-year-old Alexandra Gabrielli was arrested and charged in connection with this case. The 19-year-old has not been charged or arrested to date.