Steve Neavling

For just $89, a former San Diego college student has been selling malicious software that spies on suspected cheating lovers.

Although Carlos Enrique Perez-Melara likely didn’t make a lot of money, he was one of five people recently added to the FBI’s list of most wanted cyber-criminals, the San Francisco Chronicle reports.

According to the FBI, Perez-Melara would send an electronic greeting card via email to the subjects of his surveillance. Once the card was opened, the software would begin capturing emails and instant messages, the AP explained.