Clarence Carr Jr. and his son, Eric D. Carr, were convicted Friday of a knife and gun attack on a store clerk last summer.
The jury deliberated about 90 minutes before finding the Carrs guilty of attempted murder and three weapons counts in what prosecutors described as a revenge shooting and stabbing of Antoine Marble on July 26 in a Jefferson Avenue liquor store.
Clarence Carr, 50, and Eric, 25, both of Hickory Street, displayed little emotion as the verdict was announced.
The Carrs are being held in jail pending sentencing April 5.
Deputy District Attorneys Lawrence M. Schwegler and Mara Caerleon Leighbody, who jointly prosecuted the case, said they will urge Erie County District Attorney Frank J. Clark to seek the maximum 25-year prison term for both men. They face a mandatory prison term of at least five years.
The attack was captured by surveillance cameras at the Buffalo Discount liquor store at 279 Jefferson, where Marble works.
Schwegler described the attack on the unarmed Marble -- who had beaten the younger Carr in a street fight 14 months earlier -- as "one of the most chilling" crime scene films he has seen in two decades as a prosecutor.
Carl H. Dobozin, Eric Carr's attorney, and Jack Danziger, Carl Carr's attorney, said their clients insisted they went after Marble in self-defense because they anticipated being attacked again in the store by a street gang. They will appeal the verdict.
Schwegler and Leighbody said the Carrs made up the street gang scenario after they were arrested by Buffalo police and Town Gardens private security guards as they continued to slash and shoot at the unconscious Marble across the street from the liquor store.
Schwegler and Leighbody said the store surveillance film showed the Carrs were assisted in the attack by a third man, never identified, who was wearing a Hawaiian shirt.
Marble, who needed emergency surgery for gunshot wounds in the abdomen, still walks with a limp due to the shooting.