I highly recommend the
Jane Rizzoli and Maura Isles series by Tess Gerritsen.
1.
The Surgeon (2001)
2.
The Apprentice (2002)
3.
The Sinner (2003)
4.
Body Double (2004)
5.
Vanish (2005)
6. T
he Mephisto Club (2006)
7.
Keeping the Dead (2008)
8.
Ice Cold (2010)
http://www.fantasticfiction.co.uk/g/tess-gerritsen/