Joe St. Veltri , Gowda 's attorney claimed that since the media attention of the Columbine High School massacre , there had been a change in the law enforcement community regarding firearms sales . Alcohol , Tobacco and Firearms " now focuses some of its law enforcement efforts in an area that they had ignored . ... I think gun shows , in the last two years , have become the most important concern of ATF , " according to Veltri . The bureau 's Denver enforcement chief , Gerald Petrilli , agreed . He said that better investigative techniques and enforcement strategy and improved manpower have resulted in more federal court cases
Columbine High School massacre
Columbine High School massacre
James Gowda