They didn't kill him, he died because of his own actions. They had every right to pursue and subdue him.
They didn't kill him? Are you serious? What, did he commit suicide?
You may be correct about them having a right to pursue and subdue him, that would depend on Texas law.
However, once he had been subdued, the guards (whatever glorified title they give them at Wally World) had both a moral and legal RESPONSIBILITY to see to his well being.
Failure to do so is what led to his death.
manslaughter or negligent homicide?
Ruck
Once you subdue someone, the situation changes, legally speaking. Your right to use deadly force more or less goes away once you have subdued someone, no matter how big of a threat they might have been before you subdued them.