(CNN) - Aaron Hernandez's murder conviction was reinstated Wednesday by Massachusetts' highest court in a ruling that also ended an antiquated legal rule in which convictions were thrown out when a defendant died before an appeal was heard.
The Supreme Judicial Court's decision comes nearly two years after a state judge vacated Hernandez's murder conviction after the former NFL star's suicide.
Hernandez was serving a life sentence for the June 2013 murder of Odin Lloyd. Hernandez hanged himself in his prison cell on April 19, 2017, just days after his acquittal on double-murder charges in a separate case.
Massachusetts courts had generally recognized a legal rule called "abatement ab initio," or abatement, in which convictions are thrown out if a defendant dies prior his or her appeal being resolved.
But Wednesday's high court ruling called the longstanding legal principle "outdated and no longer consonant with the circumstances of contemporary life, if, in fact, it ever was."
Instead, the court said that when a defendant dies during an appeal, the appeal will be dismissed and noted in the court record, and the conviction will stand. The court record will note that the conviction was "neither affirmed nor reversed because the defendant died."
"We are pleased justice is served in this case, the antiquated practice of vacating a valid conviction is being eliminated and the victim's family can get the closure they deserve," Bristol County District Attorney Thomas M. Quinn III said via Twitter.
The Lloyd family, in a statement released by family attorney Doug Sheff, said the ruling solidified its faith in the Massachusetts justice system.
"This decision has helped the family tremendously to obtain closure from the horrible loss of their beloved Odin. He was an inspiration to all who knew him and a devoted member of his family and the entire community."
Attorney John Thompson, who represented Hernandez in the Lloyd case, said he was disappointed with the decision.
"We think the Court departed from its usual standards in coming to this decision and intend to seek reconsideration of that aspect of its decision that applies its newly minted law to Mr. Hernandez's case," he said in a statement. "The Court has overlooked an essential point of fairness in applying its new rule to this case."
Attorney Jose Baez, who represented Hernandez in the separate double-murder case in Boston, said the ruling "will be a hollow and short-lived moment for the Commonwealth, since this decision is not only cruel for Aaron's family, but also disappointing and discouraging to all of those families who seek to clear their loved ones' names, in a flawed system where wrongful convictions are reversed every day."
At the time of the abatement, prosecutors argued that throwing out Hernandez's conviction would "reward the defendant's conscious, deliberate and voluntary act" of killing himself and that the abatement rule has no solid historical or legal basis.
"A defendant, who can cut off his own criminal appeal by suicide and stall civil litigation by a stay of proceedings ... has the reins of the entire justice system in his own hands," prosecutors wrote.
Thompson had argued that the manner of death should not matter -- when a person dies while his conviction is under direct appeal, the conviction should be vacated.
Abatement had generally been recognized in Massachusetts, even in high-profile cases of suicide.
John Salvi was convicted of murder in 1996 for opening fire at a Planned Parenthood clinic in Brookline, but his conviction was vacated when he took his own life in prison before his appeal was heard.
And the death of John J. Geoghan, a priest at the center of the Catholic Church's sexual abuse scandal, also led to the abatement of his conviction.