Tom Mauser is the father of Daniel Mauser who was killed in the massacre at Columbine High School in 1999. Since that time, Tom has become a nationally recognized advocate for reforming our nation's gun laws, and he has helped lead the successful effort to close Colorado's gun show loophole in 2000. He is a board member and spokesperson for Colorado Ceasefire, one of the state's leading organizations on gun violence prevention, and he played an active role in the passage of Colorado's new gun laws in 2013. Tom is the author of Walking in Daniel's Shoes, and often speaks to crowds wearing the shoes worn by his son, Daniel, on the day of the massacre.