A 19-year-old Oklahoma man convicted in the fatal stabbings of five family members could learn Friday whether a jury thinks he should spend the rest of his life behind bars.

Jurors are expected to hear testimony before deliberating over what sentence to recommend for Michael Bever on five first-degree murder counts: life in prison with or without parole. They convicted him late Wednesday on the murder counts and one count of assault and battery with intent to kill.

On Thursday, they recommended that he serve 28 years in prison on the assault and battery conviction.

Michael Bever was 16 when he and his then-18-year-old brother, Robert Bever, killed their parents and three younger siblings in the Tulsa suburb of Broken Arrow, prosecutors said. The older brother pleaded guilty in 2016 and was sentenced to life in prison without parole.

"They punched a knife into their sister's neck," District Attorney Steve Kunzweiler said after the jury convicted Michael Bever. "They then went and attacked their mom, gave her 40-some-odd wounds to her body. They then hunted down their dad and stabbed him in a bedroom. And then they had the audacity to go and knock on a door to try to lure out those children so they can stab them, so that they can go on some kind of cross-country crime spree.

"I want to know: When do you want them out? When do you want them as your next-door neighbor?"

Defense attorneys argued that Bever was led astray by his older brother, and Robert Bever testified that he wanted to take responsibility for all of the killings.

The younger brother's attorney, Corbin Brewster, said after the verdict that he will urge the jury to sentence Michael Bever to life with the possibility of parole. He said his client was "stunned" by the verdict.

"The light at the end of the tunnel for Michael Bever is the most important thing that I can fight for at this point," Brewster said. "The jury has spoken. This is all we have left to fight for, for him. And we're going to give it our best shot."

But prosecutors said Michael Bever should be locked up for life because he was a willing participant in the gruesome killings of his family as well as the attack on a sister, now 16, who survived.

Brewster argued that it was Robert Bever, not Michael Bever, who was behind the attack.

"What happened in that home was horrible. We don't dispute that," Brewster said. "Michael Bever is honestly a gentle young man who was misled by a mentally ill older brother, and there's a lot more layers to him as a human being than just what happened back in 2015."