Article Photos: ‘Investigating gang crimes is like digging a hole in a mud puddle,’ says Oklahoma City police gang unit investigator 2/2

Oklahoma City police gang unit Detective Tim Hock teaches a cadet class on gangs in March at the Oklahoma City police academy. Hock has worked on the department’s gang unit for 19 years: 10 years on the unit’s street team and nine as a unit detective.  Photo by LeighAnne Manwarren, The Oklahoman