Positive youth development (PYD) orients youth toward pro-social and forward-looking behavior through programs that emphasize youth empowerment and involvement, focus on skill development and character building, incorporate community collaboration at multiple levels, and include positive adult role models and mentors that interact with youth in meaningful ways. Research has shown that youth exposed to programs with these features are more likely to demonstrate traits associated with development along a positive life trajectory, represented by a life free from substance abuse and violence and rich with meaningful relationships, a healthy sense of self, satisfying career, and clear ties to one's larger community. This report expands on the current research into PYD programs and youth outcomes by examining PYD features in a public school setting. An existing program, the Los Angeles Police Academy Magnet School Program (LAPAMS), serves as a case study to examine the extent to which PYD features are incorporated in this particular mode of delivery. Specific program features, such as including law enforcement officers as key program mentors and extending the program across several years, may provide insights into how PYD approaches can be utilized by non-traditional community agents to reach youth in new ways. The report explores how law enforcement officer attributes, length of exposure to LAPAMS programming, and early exposure to LAPAMS programming relate to a set of youth outcomes. The following chapters are included: (1) Positive Youth Development; (2) The Los Angeles Police Academy Magnet School Program: A Public School-Law Enforcement Partnership that Promotes Positive Youth Development; (3) Study Aims and Approach; (4) LAPAMS and Positive Youth Development; (5) Police officers in the LAPAMS program; (6) LAPAMS Program Exposure, Officer Quality and Selected Youth Outcomes; and (7) Discussion. The following are appended: (1) Descriptions of the PYD philosophy and approach to youth programs; (2) Police Academy Magnets Evaluation Oral Consent Script--Survey; (3) Police Academy Magnets Evaluation Oral Consent Script--Student Interview; (4) Interview Protocol for LAPAMS Students; (5) LAPAMS Features by school; (6) Officer ratings by school; (7) Years in LAPAMS and Student Outcomes--Background Covariate Details; (8) Exposure by Years in LAPAMS with Grade Level as Covariate; and (9) Exposure by Attended LAPAMS in Middle School.