Andrew Ackerman's brother James died while playing rugby league as the result of a shoulder charge three years ago.
Now, he's urged NRL chief executive Todd Greenberg to take action against Melbourne fullback Billy Slater for a similar challenge.
NRL fans wait to find out if Storm star Billy Slater will be suspended for a shoulder chrage against Cronulla Sharks winger Sosaia Feki in the 14th minute of the preliminary final at the weekend.
Slater was charged with a grade-one infringement. If found guilty by a judiciary panel on Tuesday evening, he will miss Sunday's grand final.
While many have voiced their support for Slater, Ackerman took to social media to share his concern over the incident.