Joseph Hannigan, 60, was an NYPD Detective and responded to the 9/11 terrorist attacks. He moved to Texas and became chief of police of El Centro College, where training methods he taught saved police lives when a gunman ambushed officers on July 7, 2016.
Now Joseph Hannigan is in hospice care from World Trade Center-related pancreatic cancer.
A number of officers who worked with him spoke to Maria Guerrero of NBC 5 Dallas/Fort Worth.
