And with technology like CRISPR, you kinda wonder how that will impact forensic science.

Not at all, probably.

From what I know about CRISPR, and forensic DNA testing, it should be extremely difficult or impossible to, for example, change your "genetic fingerprint" as it is called.

If I remember correctly, those methods primarily use repetitive patterns, which should be hard to modify with CRISPR. And you'd need to modify hundreds of them, and in billions of cells of your body (even if you try to only get white blood cells and their progenitors).