Texas police helicopter video captures highway shooting.

“The two face off for a few seconds, until Montelongo raises his weapon and fires, striking the trooper in the arm. Troopers returned fire, mortally wounding him.”

www.mysanantonio.com/news/local/crime/article/DPS-aerial-footage-shows-deadly-shootout-between-13203123.php

h/t Mccruise