Schreiber is either alive, in which case he must remain in prison, or he is dead, in which case this appeal is moot.
What does it mean to complete a sentence of life in prison?
Schreiber has argued in court that he was resuscitated against his wishes and that his life - and his sentence - should have ended with his medical death in 2015.
Four years ago, convicted Iowa murderer Benjamin Schreiber actually died - only to come back to life to fight his prison sentence.
Shortly before Terry's murder, he, Schreiber, and another woman named Evelyn Tangie had been traveling in a vehicle together. Therefore, they find the possibility that he is dead "unlikely". That led to septic poisoning that caused him to become unconscious.
An appeals court just ruled that's not how it works.
The district court was not buying it, however, calling that argument "unpersuasive and without merit".
Schreiber appealed, sending the case to the Iowa Court of Appeals.
In its opinion, the appeals court said a "plain reading" of Iowa law says defendants guilty of a class A felony "must spend the rest of their natural life in prison, regardless of how long that period of time ends up being or any events occurring before the defendant's life ends".
Schreiber's lawyer didn't immediately respond to a request for comment on the ruling, and it's not clear whether the inmate plans to file another appeal.
Schreiber also had said in his post-conviction relief application that his due process rights were violated because the hospital didn't abide by his do-not-resuscitate order. The courts have not addressed whether he was wrongfully resuscitated.