Oneal, 32, was convicted in June of murdering his girlfriend and their 9-year-old daughter.
Oneal was also found guilty of attempted murder in the stabbing of his 8-year-old son, who was lit on fire in the attack, WTSP-TV reports, and Oneal was convicted of arson and aggravated child abuse.
The couple’s daughter had cerebral palsy.
On the night of March 18, 2018, in Riverview, Florida, Oneal shot and beat to death 33-year-old Kenyatta Barron with a shotgun, then killed his daughter with a hatchet, the Tampa Bay Times reports. Oneal stabbed the couple’s son, then poured gasoline in their house and lit it on fire.