The man in black hauled off in his SUV. The second man with the rifle — a neighbor unidentified as of Sunday night — came to Langendorff. The two men were strangers. “He briefed me quickly on what had just happened and said he had to get him,” Langendorff said later. “So that’s what I did.”
More at the link -
https://www.washingtonpost.com/news/morning-mix/wp/2017/11/06/an-unlikely-hero-describes-gun-battle-and-95-mph-chase-with-texas-shooting-suspect/?hpid=hp_hp-top-table-high_mm-langendorff-602am%3Ahomepage%2Fstory&utm_term=.2adf38217a9c