Detailed text transcripts for TV channel - CNN - 20180721:16:43:00
Shots. the doctor immediately went down. >> reporter: a private ambulance passed by the scene and emts stopped to help before the houston fire department arrived. >> i seen somebody flagging us down. i said, you know, something's wrong. i drove up a little further and i seen a gentleman sprawled out with blood all over. >> we stopped, rendered aid. >> reporter: authorities say investigators don't know if the shooting was targeted, random or caused by road rage. a few people may have witnessed the attack and police are looking at surveillance video. >> our homicide investigators are interviewin...