US cities with most murders (after DC):
St. Louis, Missouri (69.4 per 100,000 people)
Baltimore, Maryland (51.1 per 100,000 people)
New Orleans, Louisiana (40.6 per 100,000 people)
Detroit, Michigan (39.7 per 100,000 people)
Cleveland, Ohio (33.7 per 100,000 people)
Las Vegas, Nevada (31.4 per 100,000 people)
Kansas City, Missouri (31.2 per 100,000 people)
Memphis, Tennessee (27.1 per 100,000 people)
Newark, New Jersey (25.6 per 100,000 people)
Chicago, Illinois (24.0 per 100,000 people)
I would start with those 3.