From the May 9, 1911 Brooklyn Daily Eagle:

“Stockton, Cal.— While Margaret Martinez, a 19-year-old Spanish girl, of whom he was insanely jealous, was playing the piano yesterday for his entertainment, Paul Miller, a miner, aged 43 years, fired two shots into her back, killing the girl. Rushing into an adjoining room, Miller threw himself on a bed, placed a stick of dynamite in his mouth, lit the attached fuse, and blew his head into fragments.”