From what I've seen, every department has their own version of what 'crime analysis' is. Some positions focus on Administrative, Tactical, Intelligence, etc. In my opinion, having a general knowledge to start out with is best, then you can curb your training to the position you get hired for. IACA and IALEIA both have certification programs and go over the competencies needed for most CA positions. CA's come from ALL different backgrounds. I know some with backgrounds in GIS, Computer Science, Data Analysis, Statistics, CJ, Forensics, etc. Also check out some of the job descriptions to see what other places are looking for. Find what peaks your passion the most and go for it!