20 Pa.C.S. § 3181: Revocation of letters.

(a) When no will.--The register may revoke letters of administration granted by him whenever it appears that the person to whom the letters were granted is not entitled thereto.

(b) When a will.--The register may amend or revoke letters testamentary or of administration granted by him not in conformity with the provisions of a will admitted to probate.

(c) Death charges.--Whether or not a will has been submitted or admitted, the register may revoke letters testamentary or of administration when it appears that the person to whom the letters were granted has been charged with voluntary manslaughter or homicide, except homicide by vehicle, as set forth in sections 3155 (relating to persons entitled) and 3156 (relating to persons not qualified), provided that the revocation shall not occur on these grounds if and when the charge has been dismissed, withdrawn or terminated by a verdict of not guilty.