Digital forensics examiner here; it’s extremely accurate especially for the tech involved at the time. I think I spotted a very small handful of things it had to kick under a rug for the plot to work, which is unbelievably small for a show like that.

It’s easily the best LE show that exists, but not just because of its accuracy; it’s incredible in its pure honesty. Some of the cops are total worthless shit bags, worse than the best of the criminals easily. Allowing that overlap, one that exists in real life, injects a whole lot of nuance into the story that is basically nonexistent outside of the show. And allows characters to grow and improve. It takes writers with actual LE experience (which they had) and a lot of talent to write that kind of thing without totally blowing it.