A crime scene investigator salary will vary depending on many factors listed here. As a rule of thumb, the more college education you have, the more money you will make. Although this may not always be the case, a person with a Bachelors degree will usually make more than someone with just an Associates degree.
It is also important to know that a CSI working in a large city will make more money than a CSI working a small town. For example, you will make more money as a CSI in New York City than you will in a rural area of Alabama.
As with any other job, the more experience you have, the more you will get paid. A veteran CSI with over 25 years of experience can make two or even three times the salary as someone who just become a CSI.