A jury has found Anthony Grigoroff guilty on all counts in the murder of Garrison garage owner John Marcinak. According to LoHud.com, the decision in Putnam County Court came after more than 12 hours of deliberations. Grigoroff was charged in the shooting of Marcinak, a Garrison father of three, outside Marcinak’s Garrison Garage. Jurors began deliberating Thursday and continued through Friday. No date for sentencing has been set.