Well, in the Southern District of Florida the criminal conviction is still upheld.
In U.S. v. Livoti, a juror named J.D. responded to a jury summons to sit on the criminal trial of Anthony Livoti. After being selected, J.D., along with eleven other jurors, found Livoti guilty of fraud related charges and he was subsequently sentenced to 10 years imprisonment and ordered to pay $827 million. Livoti had been involved in a massive insurance investment scam.
It was later revealed that the summons sent to J.D. was actually for his father who lived with him and shared the same first and last name. The defendant attempted to use this fact as grounds for a new trial. However, the trial judge denied the defendant's request finding that "[t]here is no indication that this incident was anything other than an honest mistake on the son, J.D.’s part. And Livoti introduces no evidence that shows that J.D. was motivated by actual bias."