20 Pa.C.S. § 8805: Tenancies by the entirety.

One-half of any property held by the slayer or elder abuser and the decedent or victim as tenants by the entirety shall pass upon the death of the decedent or victim to his estate, and the other half shall be held by the slayer or elder abuser during his life, subject to pass upon his death to the estate of the decedent or victim.