What's proper punishment for man without remorse?

Based on testimony in the trial of Martin J. Koliser Jr. he is a man who showed no respect for the life of others, and so should not be surprised if a jury decides that he should forfeit his.
Koliser was found guilty Thursday of aggravated murder of a police officer and attempted murder of another man.
Perhaps Koliser's lawyers will be able to make a compelling case for mercy next week when the penalty phase of the trial is held. They will be given an opportunity to argue that any of a variety of factors militate against giving Koliser the death penalty. The system is designed to protect the rights of the defendant in ways that a cold-blooded murderer may not even be able to understand.
But absent mitigating circumstances, Koliser appears to be a text book example for why the death penalty remains an appropriate punishment for someone who chooses to take another person's life.
Clear intent
Indeed, Koliser had every intention of taking two lives in the early morning hours of April 29.
About 12:30 a.m., outside a Mahoning Avenue bar, Koliser pointed his pistol at the chest of Donell Rowe during an argument. When Rowe, in an ill-advised display of bravado told Koliser to do what he had to do, Koliser looked him in the eye, said, "Good-bye," and pulled the trigger.
What can anyone say to excuse that kind of depraved indifference toward the life of another human being?
Two hours later, Koliser pulled the trigger again. In the case of the shooting of Rowe, Koliser had ample opportunity to consider the consequence of his actions. In the killing of Youngstown Police Officer Michael Hartzell, Koliser obviously thought about what he was going to do and then did it.
Noticing Hartzell's cruiser behind him at a red-light, Koliser made the decision to kill a policeman before the policeman could arrest him for the shooting of Rowe. He got out of his car, walked up to the cruiser and shot Hartzell in the head.
He later described what he had done in gruesome detail to a friend who helped him flee town..
No cause for compassion
There are those who would argue that in taking Koliser's life, society is no better than he. Not true. Michael Koliser, 26 years old, has made himself unworthy of society's concern. He is not worth feeding, clothing and housing for 30 or 40 or 50 years. He doesn't deserve to get books to read, television to watch and medicine to take when he's not feeling well.
There is a hard, cold fact of life. Some people's lives are worth more than others. Michael Hartzell, 30, was a police officer and a volunteer firefighter, a young man with a lifetime of public service stretching before him. His life had value. He made it so.
Martin Koliser is a thug and a murderer, who even in the courtroom exhibited no compassion for his victims -- making a mocking gesture to Rowe after Rowe testified -- and giving no one any reason to believe that society will better by his staying alive one minute longer than is legally necessary.