Federal prosecutors say anything less than execution for an Arizona convict who murdered an Oklahoma couple in 2010 would not be justice.
Jurors heard opening statements Wednesday in the final phase of the capital murder trial of John McCluskey. He was convicted last month of carjacking resulting in death, witness tampering by causing death and other charges in the slayings of Gary and Linda Haas of Tecumseh, Okla.
Prosecutor Greg Fouratt says McCluskey has lived a life of crime, is callous and has shown no regard for human life.
The defense says McCluskey's inability to control his impulses isn't his fault, but rather the result of brain damage and an abusive childhood.
Jurors are expected to hear weeks of additional testimony before deciding whether McCluskey should be executed or sentenced to life in prison.
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.