the job prospect for forensic isn't that great overseas as well to be honest. I've friends in the course and they are sweating over their future careers. For Criminology, it is a rather wide area. You can pursue it in psychology or even in law. Depending on what you want to do. For autopsy, you'll need to be a pathologist ie after your MBBS/MD degree.

Local unis do accept A levels but they prioritize matrik/form 6 students if i'm not mistaken. and doesnt necessarily mean you can get the course you want. =) all the best.