Frank Ortegon, 30, was sentenced Wednesday to 20 years in prison and 20 years of probation for one count each of aggravated assault, aggravated battery and burglary, The Forsyth County News reported.
Prosecutors agreed to drop the remaining 17 counts, including several murder counts, as part of a plea agreement.
A total of seven people were either shot or stabbed in the rampage in the Forsyth County farmhouse, which left three teens and one adult dead.
Jason McGhee was sentenced last year to four consecutive life sentences plus 100 years. Marcin Sosniak’s case is being appealed to the Georgia Supreme Court.
Prosecutors say the three men stormed the farmhouse that was a popular teenager hangout, stabbing and shooting those inside in March 2006. Killed were Kyle Elliott Jones, 17; Mariel Elisabeth Hannah, 18, William Christopher Osment, 15, and Lynn Bartlett, 56.