Hearing set for 2 accused of killing their Oklahoma family

NEWYou can now listen to Fox News articles!

Two Oklahoma teenagers are due in court to face accusations they stabbed their parents and three siblings to death in a rampage last summer.

Eighteen-year-old Robert Bever (BEH-vuhr) and 16-year-old Michael Bever have pleaded not guilty to first-degree murder. Prosecutor Steve Kunzweiler said they planned the crimes, but hasn't discussed a motive.

The teenagers' father was stabbed 28 times, while their mother had at least 48 wounds. Two family members survived — a toddler and a teenage girl. The girl plans to testify for prosecutors at Tuesday's preliminary hearing.

According to search warrants, one brother told police plans for the killings were stored on a computer thumb drive at the family home in Broken Arrow, a Tulsa suburb.

A judge rejected Michael Bever's request to be tried as a juvenile.