Francis Rawls, a former Philadelphia cop, will remain in jail for refusing to decrypt a hard drive federal investigators found in his home two years ago during a child abuse investigation. The suspect appealed the indefinite prison sentence twice, but both appeals failed. His lawyers tried to argue that holding him breaches his Fifth Amendment right to not incriminate himself. The prosecution used this legal trickery to avoid calling Rawls as a witness. This is also the same piece of legislation the FBI used against Apple when it tried to force the FBI to unlock the phone of the San Bernardino mass-shooter.
Source: https://www.bleepingcomputer.com/news/legal/man-who-refused-to-decrypt-hard-drives-still-in-prison-after-two-years/