Reagan was seriously wounded by a bullet fired by John Hinckley Jr. in an attempted assassination on March 30, 1981.
John Hinckley Jr. owned a gun.
He didn't necessarily own the gun he used to shoot, it could've been borrowed. 
( z1 own :ARG0 ( z2 person :name ( z3 name :op "John" :op "Hinckley" :op "Jr." ) ) :ARG1 ( z4 gun ) )