Teen to Serve a Life Sentence for Each Family Member He and His Brother Brutally Stabbed to Death

An Oklahoma teen will serve five life terms in prison for brutally murdering his mother, father, two younger brothers and sister in 2015

Michael Bever, who was 16 at the time, carried out the killings with his older brother Robert Bever.

Robert was sentenced to life in prison without the possibility of parole in 2016 after pleading guilty to the murders.

Michael’s team of lawyers solely blamed Robert for the crime, saying Michael, now 19, was under his influence.

Nonetheless, prosecutors insisted Michael was just as responsible for the crime as Robert.

Parents David, 52, and April, 44, and siblings Daniel, 12, Christopher, 7, and Victoria, 5, died in their home in Tulsa of “multiple sharp force injuries,” an Oklahoma State Medical Examiner’s Office spokeswoman confirmed to PEOPLE at the time.

They left two survivors: their 13-year-old and 2-year-old sisters.

On Thursday, Michael was given 28 years for assaulting his 13-year-old sister in addition to the five life counts, ABC Newsreported.

The 2-year-old was not harmed