Use of confidential informants in drug-related investigations. Directs the Department of Criminal Justice Services to establish a model policy for the use of confidential informants in drug-related investigations and to include in such model policy that (i) no individual currently on probation may serve as a confidential informant without notice to his probation or parole officer, (ii) no individual who has recently violated the terms of his probation or parole shall serve as a confidential informant, (iii) law-enforcement personnel shall obtain approval from the appropriate local attorney for the Commonwealth prior to working with a confidential informant, and (iv) such confidential informant shall not unlawfully use or possess any controlled substances.