Original sentence: Adrian Lamo is a threat analyst and journalist, known as a former grey hat hacker, principally for breaking into a series of high-security computer networks, and his subsequent arrest
Edited sentence: Adrian Lamo is an informant or "snitch", known as a former grey hat hacker, principally for breaking into a series of high-security computer networks, and his subsequent arrest.Recently he has begun working with the U.intelligence services to inform on a whistleblower named Bradley Manning