A Massachusetts man who reportedly illegally accessed the cell phone of socialite Paris Hilton 10 years ago has agreed to serve four years in federal prison for a more recent hacking spree that targeted computer networks around the country, including those belonging to law enforcement organizations that stored sensitive data and communications. Cameron Lacroix, 25, of New Bedford, Massachusetts, submitted a written agreement to plead guilty to two counts of computer intrusion and one count of access device fraud, documents filed in Boston federal court alleged.