Sorry for the busted link K, but that is copied from a different article, confirming a snippet I heard earlier.
The man’s mother — who didn’t want to show her face or give her name — told Eyewitness News her son didn’t commit any crime. She said, “My son is innocent. I was in the house with him, so when that happened, my son was home.
http://abc11.com/news/man-in-custody-after-fatal-ambush-on-deputy-in-houston/961741/