OMAHA, Neb. (AP) — An Omaha man convicted of killing four people in 2013 is arguing with his own lawyer and one of the judges who will determine whether he will face the death penalty.

A three-judge panel is scheduled to spend most of the week hearing evidence about whether Nikko Jenkins’ crimes warrant execution.

But Jenkins objected Monday to his lawyer presenting an IQ test that might disqualify him from execution.

The case will be the first opportunity for Nebraska’s death penalty to be imposed since voters voted to reinstate it last week.

Jenkins was convicted of four counts of first-degree murder for the August 2013 shooting deaths in and around Omaha of Juan Uribe-Pena, Jorge Cajiga-Ruiz, Curtis Bradford and Andrea Kruger. Jenkins pleaded no contest to the charges.