This looks to be a death penalty case.
Probably in a lot of states that have capital punishment, but not in Kansas. Kansas has very restrictive guidlines with respect to whom may be charged with a capital offense. They are...
The death penalty may only be given in circumstances where a defendant is convicted of pre-meditated first degree murder under the following limited factual circumstances:
* during a kidnapping for ransom
* during a killing committed under a contract or agreement
* the killing of any person by someone confined in a state correctional institution, community correction institution or jail or while in official custody
* a killing during the commission of, or attempt to commit, a rape or aggravated sodomy of any person
* the killing of a law enforcement officer
* the killing of more than one person as part of the same act or in two or more acts connected together
* the killing of a child under age 14 during a kidnapping or aggravated kidnapping with the intent to commit a sex offense upon the child
Finally, I don't believe Kansas has executed anyone in over 30 years. Plus, they only have a handful of people on death row, so it's not something that they dole out with any regularity.
Possible the shooter had been dianosed as terminal and did it as one of his last action. Nothing to loose.