HBO's Real Sports has covered the topic of violence against referees, but the program is taking another look it in its latest edition. Unfortunately, it's not to report that progress has been made. It's the opposite as another soccer referee was killed while working a match.

This troubling trend is documented in the episode that premieres Tuesday at 9 p.m. ET/PT. Here's a preview:

More HBO Real Sports: Examining Deaths Of Workers Preparing For Qatar's 2022 World Cup