Lawyers for accused Boston bombing suspect Dzhokhar Tsarnaev are asking a judge to ease prison restrictions placed on him as he awaits his trial.

Judge Napolitano said that Tsarnaev has a case “if the prison regulations interfere with his ability to defend himself.”

Napolitano believes the strongest point Tsarnaev has is that his lawyers are not allowed to talk to any potential defense witnesses without an agent of the federal government there. The government fears that the lawyers could pass some sort of message from Tsarnaev to a person on the outside. “His argument is the Constitution guarantees me an effective defense and if you don’t let my lawyers talk to my witnesses, I cannot mount an effective defense and you’re denying my constitutional right to one,” Napolitano said.