Special Agent Bob Castioni died as the result of cancer that he developed following his assignment to the search and recovery efforts at the World Trade Center site following the 9/11 Terrorist Attacks.
Special Agent Castioni had served with the United States Department of Homeland Security – Immigration and Customs Enforcement – Homeland Security Investigations for 33 years. He is survived by his wife, two daughters, a son, three brothers, a sister, and three grandchildren.
Source: ODMP
https://www.odmp.org/officer/26773-special-agent-robert-c-castioni-jr