A jury has found Justin P. Gonzalez guilty of involuntary manslaughter in the 2012 death of Nicholas Sardina, 27, of Lawrence.

Gonzalez, 23, of Mission, hit Sardina in the head with a beer bottle during a fight at a party in Lawrence on Feb. 25, 2012. Sardina died hours later, the result, prosecutors say, of a blood clot in the brain caused by blunt force trauma.

At issue was whether Gonzalez acted recklessly or with reasonable force in an effort to rescue a friend. The first trial last December ended in a hung jury.

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