Daniel Maoz, who was suspected of murdering his parents last August, was re-arrested on Monday morning for allegedly sending an anonymous letter to the courts stating that there is another witness that saw his twin brother Nir carry out the murders.
Police suspect that Maoz sent the letter through an intermediary in a last-ditch attempt to implicate his twin brother in the murder.
An additional suspect involved was also arrested.
Despite the fact that Maoz is already incarcerated, the arrest is significant because it means he will lose many of the privileges awarded to prisoners including TV, phone calls, visits and cooking privileges.
Maoz is refusing to cooperate with the investigation.