The child allegedly found the unsecured handgun in his father's vehicle.
The justices said Tuesday they will take up appeals asking the court to strike down bans on the AR-15 and similar semiautomatic firearms in Connecticut and the Chicago area.
The Supreme Court ruled in favor of Ali Hemani, a Texas man charged with unlawful possession of a gun, since he admitted that he regularly smoked marijuana.
A 52-year-old man has been charged with multiple felonies after authorities say he made homophobic threats during two separate incidents at Zuckerberg San Francisco General Hospital, according to the San Francisco District Attorney's Office.
Michael Debiase was arrested and charged with pointing and presenting a firearm at a person, according to the South Carolina Law Enforcement Division.
A Michigan officer nearly shot a student playing a "water wars" game, the school district said.