Pay scales differ based on encounter and location, but salaries often be excellent for field agents (between $30 and $40 per hour) and exceptional for specialists (more than $100,000 for toxicologists). There usually is not a lot of space for promotion beyond team leader or shift supervisor, but folks who get into crime scene investigation tend to do so for the actual investigating and not for the chance to sit behind a desk and push papers around.
Like any law enforcement and bail bonds in Los Angeles position, you usually require to have an extremely clean record when applying for crime scene investigation perform. If you have had felony convictions, can not pass a drug test, or have other significant concerns which will pop up during a background check, then in all likelihood you will not be supplied a position as a CSI.