It seems like a matter of simple common sense: If you’re turning an assignment in to a professor on a CD-ROM, make sure you hand in the right disc. But a student at Bristol Community College, in Massachusetts, seems to have missed that memo, and now he finds himself in a heap of trouble.

The student, Andrew Erickson, was supposed to submit his final exam for a computing course, but instead he gave his professor a disc filled with sexually explicit photos of children — and a catalog that listed the age of each subject. The professor opened the disc and immediately turned it over to police, who have now arrested Mr. Erickson and searched his house, according to The Herald News.

After turning in the incriminating CD, the student apparently realized what he had done: Before his arrest he sent the professor an e-mail message in which he claimed the disc contained a mix of music belonging to a friend. The message shows that Mr. Erickson could use a lesson in netiquette as well as a good lawyer: “Oh snap, I am sorry,” it begins. –Brock Read