Read’s defense attorneys argued that O’Keefe, who allegedly had a long-standing disagreement with someone at the party, was severely injured during an argument at the party and may have been attacked by a dog given the deep wounds on his arm.

A jury on Wednesday acquitted Read, 45, on the most serious charges in her second trial of leaving John O’Keefe to die in a snowstorm after hitting him with her car outside a suburban Boston house party more than three years ago. She was also acquitted of leaving the scene of an accident causing death.