OMAHA, Neb. (AP) — A three-judge panel has found enough aggravating factors for the death penalty to apply to a man convicted of killing four people in 2013.

Now, the panel will weigh mitigating factors — such as the mental fitness of the defendant — presented by the public defender to determine whether Nikko Jenkins will be sentenced to death. That decision will be determined at a later date.

The aggravating factors found by the panel Wednesday include that Jenkins killed multiple people and has a history of violence.

Jenkins pleaded no contest to the August 2013 shooting deaths in and around Omaha of Juan Uribe-Pena, Jorge Cajiga-Ruiz, Curtis Bradford and Andrea Kruger. The shotgun deaths in three separate attacks occurred over a 10-day period just weeks after Jenkins’ release from prison.