The first heavily publicised case involving the successful use of the defense,[32] Caffrey was arrested on suspicion of having launched a Denial of Service attack against the computer systems of the Port of Houston,[33] causing the Port's webserver to freeze[34] and resulting in huge damage being suffered on account of the Port’s network connections being rendered unavailable[35] thereby preventing the provision of information to "ship masters, mooring companies, and support companies responsible for the support of ships saling and leaving the port".[35] Caffrey was charged with an unauthorised modification offence under section 3 of the Computer Misuse Act 1990 (section 3 has since been amended by the Police and Justice Act 2006 creating an offence of temporary impairment.