Protestors against the Milwaukee Police Department gathered Sunday on Wisconsin Avenue. The group of about 50 protestors called for the resignation of Police Chief Ed Flynn in the wake of the death of Derek Williams in Police custody in July 2011.

Protestors walked across the city to stop and protest outside the Milwaukee Courthouse. They passed by Marquette’s campus and the Bradley Center, chanting “Chief Flynn has got to go.”

Aaron Maybin, sophomore in the College of Communication, saw the protestors while walking to the Bradley Center. He spoke with a woman who identified herself as Williams’ sister.

“She said her brother wasn’t getting justice for his death and that nothing was being done,” Maybin said. She was carrying a picture of Williams.

The controversy over Williams’ death reignited this fall when the Milwaukee Journal-Sentinel obtained the squad car surveillance video of Williams’ arrest, and the Milwaukee County medical examiner changed his ruling from natural death to homicide.

The Federal Bureau of Investigation also launched an investigation into Williams’ death and practices of the Milwaukee Police Department. According to the New York Times, a status hearing to set an inquest date for the federal investigation is scheduled for Nov. 14.

Correction: An earlier version of this article misspelled Derek Williams’ first name. It is spelled “Derek,” not “Derrick.” The Tribune regrets the error.