Advice on getting involved in cyber crime?

I have been fascinated with cyber crime investigations and was wondering how I could get a job in investigating it or helping with prevention? Is there specific certs that you would recommend or what steps I should take? Or types of jobs I should look for? Currently just working a basic help desk job and I have recently joined the Army Reserve and I will be reclassing into a 25B (IT Specialist). My first MOS was a 68W (Medic).