A federal firearms expert and an emergency room doctor testified Friday as the third week of Jacob Carrizal’s trial came to a close.

Carrizal, 35, is the first of 154 bikers indicted in the May 17, 2015, shootout at Twin Peaks between rival biker groups to stand trial.

Prosecutors have called 45 witnesses and introduced close to 1,000 pieces of evidence during the first 13 days of testimony. Carrizal, a Dallas-based railroad employee, is president of the Dallas Bandidos chapter and led a group of Bandidos into the Twin Peaks parking lot that Sunday afternoon moments before the group clashed with Cossacks, another biker group that had taken over the patio area at the restaurant.

John Jacobson, a firearms and tool mark examiner for the Bureau of Alcohol, Tobacco, Firearms and Explosives in California, testified about his examination of 154 firearms officers seized after the deadly shootout that left nine dead and more than 20 injured.

The firearms, plus 400 other weapons of all varieties, were found on the grounds of Twin Peaks and Don Carlos restaurants and in vehicles belonging to the hundreds of bikers.

Jacobson said he was able to match 12 of the firearms as positively firing a number of shell casings and projectiles found at the scene or that were retrieved from the bodies of the slain bikers during autopsies.

Jacobson said it was not his job nor could he determine if any of the projectiles he matched to weapons caused the deaths of anyone. Pathologists from the Southwestern Institute of Forensic Sciences in Dallas will be testifying next week about wounds suffered by each man and the manner and means of their deaths.

Waco police did not send the three .223 rifles Waco officers used to kill bikers posing threats to them and others to the ATF lab in California. Those rifles were sent to the forensic lab in Dallas for analysis, and no testimony has been offered thus far about those findings.

Two officers, Heath Jackson and Michael Bucher, have testified about shooting bikers that day from the Don Carlos parking lot about 50 yards away, but it was not clear from their testimony how many bikers they killed. It was clear from Jacobson’s testimony, however, that some bikers were shot by police rifles and also by other bikers with handguns.

In other testimony, Dr. Richard Whitworth, an emergency room physician at Baylor Scott & White Hillcrest Medical Center, testified he was one of three ER doctors on duty that Sunday afternoon when 20 bikers with gunshot wounds or other assaultive injuries came flooding in within a 20-minute time span.

Whitworth said hospital officials didn’t have time to get their names at first so they assigned state names to treatment rooms, like Alabama, Alaska and so on, as a way of identifying who was being treated.

Whitworth said he and the other two doctors stood in the ER doorway as the bikers arrived and assessed how badly each was hurt, treating the more seriously injured ones first and working their way down the line.

Judge Matt Johnson recessed the jury for the weekend after a series of objections from Carrizal’s attorney, Casie Gotro. Gotro objected that hospital records characterized why the bikers were there as “a mass shooting from a biker gang feud.”

The judge ordered that phrase redacted from the records and recessed proceedings while Gotro read the records for other potential objections.

Prosecution testimony resumes at 9 a.m. Monday.

Carrizal is charged in Waco’s 54th State District Court with directing the operations of a criminal street gang, one count of engaging in organized criminal activity with the underlying offense of murder and a count of engaging in organized criminal activity with the underlying offense of aggravated assault with a deadly weapon.

Staff writer at the Waco Tribune-Herald covering courts and criminal justice. Follow me on Twitter @TSpoonFeed.

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