Heckman's lawsuit came in the midst of public outrage over alleged police misconduct captured on cellphone video in the cases of Michael Brown, the unarmed teen fatally shot by Ferguson, Mo., police; Freddie Gray, who died after he was shackled and driven without seatbelts in the back of a Baltimore police van; and Walter Scott, who died after he was shot in the back by a North Charleston, S.C., police officer.