 LOS ANGELES--BUSINESS WIRE--- SJT CLASSACTION--Glancy Prongay Murray LLP GPM, a leading national shareholder rights law firm, has commenced an investigation on behalf of San Juan Basin Royalty Trust Trust or the Company NYSE: SJT investors concerning the Companys possible violations of the federal securities laws. If you suffered a loss on your Trust investments or would like to inquire about potentially pursuing claims to recover your loss under the federal securities laws, you can submit yo 