Complex sentence: David Brom (born October 3,1971) killed his parents, brother and sister with an axe when he was sixteen in February 1988 in Cascade, Township near Rochester, Minnesota.
Split into simpler sentences: David Brom (born October 3,1971) is an American mass murderer. He killed his parents, a brother and a sister with an axe when he was sixteen in February 1988 in Cascade, Township near Rochester, Minnesota.