"I Can't Breathe Sir." In 2011 Williams suffocated to death while handcuffed, naked from a strip search, in the back of a police car. He repeatedly told white Milwaukee police officers he couldn't breathe for at least 15 minutes between the time of his arrest and his death. They repeatedly ignored him as he suffocated to death. 

From [HERE] The family of Derek Williams, Jr., who suffocated at age 22 in the back of a Milwaukee squad car, denounced the white officers who ignored their relative's cries for help in a federal lawsuit filed five years after the young Black man's death.

     Just after midnight on July 6, 2011, white Milwaukee police overseers arrested Williams as a suspect in a robbery. Williams had run from police before being apprehended in the backyard of a house at 2752 N. Buffum St.

     Footage from the back of the squad car showed Williams repeatedly told the officers, "I can't breathe," but police ignored his requests for medical help until he was already unresponsive 15 minutes later, his family says in a lawsuit filed Wednesday in Eastern Wisconsin Federal Court.

     Milwaukee's medical examiner initially insisted Williams died of natural causes until a local newspaper, The Milwaukee Journal Sentinel, presented the office with new evidence a year later, including the squad-car video and other records.

     With Williams' death then ruled a homicide, a coroner's inquest jury found that three of the officers — Richard Ticcioni, Jason Bleichwehl and Jeffrey Cline — could be criminally charged with failing to provide aide, but a special prosecutor declined to prosecute the men in early 2013.