It's always a sad day when I hear such news. Although I didn't know him I know the situation all too well. Prayers to the family, coworkers and all who knew him.
Would be best if it never happened, but it did, with that it's better it happened in TX than a place like IL. In TX I have faith they will deal with the murderer swiftly and severely, here in IL he would be looking forward to the rest of his life getting three squares a day along with cable TV.