Four teens already in custody for crimes related to David Grunwald’s murder now face additional charges and are expected to be back in court at the end of December for their subsequent arraignments, according to online court records.

Erick Almandinger, Dominic Johnson and Bradley Renfro all face first-degree assault and vehicle theft charges, as well as third-degree arson charges. Austin Barrett faces the same assault and theft charges, but is not facing an arson charge.

The four of them are scheduled to be back at the Palmer Courthouse to be arraigned on the new charges Dec. 27.

Almandinger, Johnson, Renfro and Barrett already face first-degree murder charges, multiple counts of second-degree murder, kidnapping and hindering the prosecution for their alleged roles in Grunwald’s death.

According to initial charging documents, Grunwald was beaten and then kidnapped and driven away in his own vehicle before the teens shot him in a remote location off of Knik River Road.

After the slaying, the accused torched Grunwald’s Bronco, the documents state.

Devin Peterson, 18, was charged with one count of hindering prosecution and three counts of tampering with physical evidence earlier this month, and didn’t face any additional charges from the batch that game down on the other teens this week.