Associated Press Mourners gather for a vigil at the scene of a mass shooting, Sunday, Aug. 4, 2019, in Dayton, Ohio. Ohio's new "Stand Your Ground" law goes into effect Tuesday. The measure approved in December removes the duty to retreat before using deadly force in self-defense. Gun control advocates say it will make Ohio a more dangerous place to live. “As these kind of laws have gone into effect, it’s never good news. we don’t have fewer shootings or fewer deaths, they all increase,” says Toby Hoover, the founder of the Ohio Coalition Against Gun Violence. She points to Florida, where she says gun homicides increased by 32% after their "Stand Your Ground" went into effect in 2005.