Not necessarily a hacker
There was no hacking or cracking involved in the database leak - it wasn't even a security hole or a backdoor. All downloaded data was available on their web server, you could simply type in the URL for the next document and Bob's your uncle. Undocumented - yes, but doesn't exactly take a rocket scientist to figure that one out.
Nevertheless - good job, I doubt they could bring any charges that would stick. Some of the published data also reveals massive discrepancies in police salaries, so many cops would side with Neo.