Congressman Sean Casten's daughter dies aged 17: Teen is pronounced dead at family home - days after her father spoke of his 'tremendous pride' after she organized training on how save someone's life from a gunshot wound Rep. Sean Casten's 17-year-old daughter Gwen Casten died on Monday morning The teenager died at the family's Downers Grove home, local police said Days before her death, Casten said he had 'tremendous pride' in his daughter She was an anti-gun violence advocate and organized training in her school to teach kids how to pack a gunshot wound Last year, Gwen and her father...