After a 23-year battle, a jury has ruled that a lawyer has grossly mismanaged the estate of Jack Ruby, the killer of presidential assassin Lee Harvey Oswald.

The estate's major asset is the .38-caliber Colt Cobra revolver the Dallas nightclub owner used to kill Oswald.The lawyer, Jules Mayer, said he plans to appeal Tuesday's verdict that effectively removed him as executor.

Ruby's brother, Earl Ruby, of Boca Raton, Fla., charged that the 82-year-old Mayer has been trying to profit from the estate.

Dallas County Probate Judge Robert E. Price must now decide how to distribute Ruby's assets. State law mandates that if he upholds the jury's decision, he must appoint a new executor. No hearing date was set.