It’s just property, right? No reason to harm someone just to protect your property. Unless he wants you dead in the process of taking your property.
Tell me exactly how an 88-year-old woman could have put up such a fight that the suspect NEEDED to kill her just to get away?
None of his previous crimes are violent. But eventually, if you rob enough houses, someone’s going to end up dead.
When you choose an action, you choose the consequences of that action.