This type of “subsequent remedial action” is not admissible in court, but it should quell public demonstrations against the Dallas PD.
P.S. If the toxicology tests revealed intoxication or the presence of illegal substances in her blood, then that would be admissible in court for the charge of manslaughter or murder. But the firing itself would not be admissible even if done as the result of the toxicology test, in my opinion, because it would still be classified as a “subsequent remedial action”.