very reliable screening process. we have requested and the harris county institute of science has done tests through the standard used by forensic labs around the country and is accepted around the world and, again, being the gold standard for toxicological testing. that may be released tomorrow. there is a set protocol for in-custody death to look for certain substances in these types of investigations. mr. mathis has asked for additional testing on behalf of waller county. >> we're listening here to this news conference being given by a number of officials in the death of sandra bland and they are about to view some photographs to make some examples from this autopsy. we're going to pull away from