Questions remain after Connecticut elementary school shooting probe
The gunman’s motive remained unclear following a probe into the mass shooting at a Connecticut elementary school in December.
Navy Yard shooting leaves 13 dead; 1 suspect shot by police, another sought
The FBI is seeking help from the public in determining the motive for a former Navy reservist carrying out a mass shooting at the Washington Navy Yard.
Mass shooting at temple results in multiple fatalities
Seven people were reported dead after a mass shooting at a Sikh temple.