Things are obviously different in Texas, but I wonder why more of the responsibility isn't being laid at the feet of Mr. Holden. Sure, Spectrum put an ID badge on him but they didn't train or direct him to kill. Further, he committed the murder on his own time. As an employer, there is a rather long list of questions that you're not allowed to ask. I'd also like to see that other companies go to greater effort to background check their technicians. Liability has always needed to consider industry standards.
Of course Mr. Holden is a financial turnip so there's no point in suing him.