Maybe, he's being paid to examine your work. If not then close the door they used to get in and be thankful that you had this kind of intruder who in effect pointed out you were not doing your job properly, rather than one that actually did damage. Learn and let live.
Prosecutions sound very sexy.
You may want to make yourself into a Cliff Stoll. But the reality is the world only ever needed one for a brief innocent period in the latter half of the 1980's. Expect some unpleasent questions as to why you were not only incompetant in the first place but then proceeded compounded the problem 100 fold by your totally self-motivated escalation. My stomache turns every time I see an exceptionaly ordinary system administrators suddenly wet their pants and quiver with excitement and anticipation when they come to the conclusion they can really be important secret agents, wooed by police, intelligence officers and the media. Its a enormous waste of public and private funds.