The only thing that website does is give you links to all other State and Federal websites. It doesn't specifically help you find what you're looking for in this case.

There are many ways to get the information you seek, but much will depend upon accessing specific information that will lead to the final result. Sometimes, it is a major search, just to find the information you need to finally do a search for the actual information you want.

The FOIA applies mostly to the Federal government, but every State has its own version of an Open Records Act. Even in a plea deal, most of the records are available, though some may be redacted (covered up, or blanked out). Furthermore, the rules as far as making copies will vary - some Courts will allow you to examine the record and copy what you need, paying a small copy fee. Other Courts will actually copy the whole record for you and charge not only for copies but for administrative costs of pulling the file and making the copies.

In all cases, in every State Open Records Act, you ARE entitled to copies of the record (assuming the case has been adjudicated) with only minor exceptions. I've not found any State law yet that demands you state a purpose for wanting the copies. They ARE public record, and that would be the ONLY purpose necessary.

Now, let's consider the actual question being asked - "How do I obtain a copy of a criminal record from .....". If what you're looking for is a person's criminal HISTORY record, it's not generally going to be possible. There are websites that claim to be able to obtain this information for a fee, but the criminal history database is controlled by the FBI (through the National Crime Information Center) and access to such records are highly restricted.

If what you're looking for is the information relating to the person's case that resulted in his incarceration, that's a different question altogether. That's where you have to pound the pavement, and possibly make a personal visit to the Courthouse. There are very few Courts that are fully automated in that regard.