Gov. Jeb Bush signed a bill on Tuesday giving Florida residents more leeway to use deadly force in their homes and in public. The move drew immediate condemnation from gun-control groups and several urban police chiefs who warned it would give rise to needless deaths. The measure is known as the “stand your ground bill.” It permits people to use guns or other deadly force to defend themselves in public places without first attempting to retreat. The National Rifle Association lobbied hard for the bill’s passage and said it would use the victory to push for similar measures in other states. Among the opponents of the measure is Miami’s Police Chief John Timoney, who called the bill unnecessary and dangerous, warning that many people, including children, could become innocent victims. He said the bill could make gun owners assume they have “total immunity.”