Sources tell 5 Investigates that a Delta Airlines pilot was handcuffed and interrogated in a hotel bathroom for close to 30 minutes before agents realized their mistake. Subscribe to WCVB on YouTube now for more: http://bit.ly/1e8lAMZ Get more Boston news: http://www.wcvb.com Like us: https://www.facebook.com/wcvb5 Follow us: https://twitter.com/WCVB Instagram: https://www.instagram.com/wcvb5/