David Francis Brom (born October 3, 1971) is an American mass murderer.
He killed his parents, brother and sister with an axe in February 1988 at the family's home in Rochester, Minnesota, after an argument with his father.
Police subsequently found a blood-stained axe in the basement that forensic tests indicated was used to kill all four victims.
As Brom's defense claim was insanity, mental illness was a factor in the trial, and much media and legal focus was placed on Minnesota's use of the M'Naghten Rules in determining if Brom was legally insane at the time of the crime.
[4] On October 16, 1989, Brom was convicted of first-degree murder and was given three consecutive life sentences with 52 years and 6 months before parole.