I love the 1st 48 crime show on A&E. Tonight's show comes from Miami, which is featured a lot on this show. Other cities include Memphis and Detroit. The show follows real detectives tracking down killers. It's almost all old fashioned police work - not too many forensics here. Great stuff. Very personable detectives.
Tru-TV (formerly Court TV) has some good shows, too. North Mission Road takes place in Los Angeles. This shows the crime solving from beginning to end, including the forensics.