DA Johnson : Richard Johnson is charged with first and third degree murder , among other charges . Johnson used gun he was carrying to shoot suspect , authorities said . DA to decide whether to charge killer of intruder who yelled ' I 'm pregnant ' CNN 's Kisa Mlela Santiago , Shelby Lin Erdman , Dominique Dodley , Christy Lenz , Chelsea Carter , Allison Malloy and Rob Frehse contributed to this report . A caseworker was killed and two people , including police , were wounded in the shooting .
DA Johnson : Richard Johnson is charged with first and third degree murder , among other charges . Johnson used gun he was carrying to shoot suspect , authorities said . A caseworker was killed and two people , including police , were wounded in the shooting .