This document examines factors that influence gang activity in Glendale, Arizona. Geographic influences like proximity to Mexico and a grid street system provide opportunities for gangs. Risk factors like single-parent families, lack of supervision, and drug availability contribute to gang involvement. The dominant gang is Grandel, comprised of 228 Mexican-American members born in Glendale who engage in narcotics, assaults, and gambling. Mapping Grandel's activities could help track its growth and repeat offenders. Recommendations include improving street lighting, promoting community events, and replacing problematic businesses.