The sentence was welcomed by Jack Jessee's family, who lamented how he has missed seeing his grandchildren grow up and attend college, and his daughter get married.
A hearing is scheduled for May 4 to discuss restitution for the victim's family.
Aehlert is set to be sentenced in September. Schrauben, who has been released from jail, is scheduled to be sentenced in July.
Garrick has pleaded not guilty and has yet to stand trial.
The case has not ended for Jack Jessee's family, but on Friday his relatives said they were relieved at the prospect of no longer having to see Sandra Jessee in court.
"This is like a 14-year ordeal that has come almost to completion," David Jessee told reporters. "This was my sister-in-law who put this whole thing together and she is going to spend the rest of her life where she belongs, thinking about this."
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