The warrant charges Brown, formerly of the Steelers and more recently the Patriots, in connection with an alleged battery case in Hollywood, Florida.
The fight started after now-suspended Silvio De Sousa of the University of Kansas blocked an opponent's shot and then glared him down.
The teen's family is from Trinidad. He said that his dreadlocks are part of his heritage and that many men in his family wear them.
Police are working to determine how many shooters were involved in the fatal incident near Pike Place Market.
"The one-drop rule ... which is what identifies and defines what a black man is, or a Negro," Capt. Javier Ortiz said during a public hearing.