From ESPN, another police union wants the NFL to go on an Apology Tour:

CLEVELAND — Browns receiver Andrew Hawkins made a strong statement during pregame introductions Sunday, but the statement was criticized by the head of the Cleveland Police Union, who said the Browns owe police an apology.

Hawkins wore a T-shirt over his jersey that read “Justice for Tamir Rice - John Crawford” on the front and “The Real Battle of Ohio” on the back. Hawkins walked slowly on the field with the shirt over his jersey. He took it off when he took part in the pregame coin toss as a team captain.

“It’s pretty pathetic when athletes think they know the law,” Jeff Follmer, head of the Police Union, wrote in a statement to Cleveland WEWS-Channel 5. “They should stick to what they know best on the field. The Cleveland Police protect and serve the Browns stadium, and the Browns organization owes us an apology.”

espn.go.com