On the morning of February 9, a milkman discovered Coors' International Travelall on the bridge, empty of occupants and with the radio on. Police identified the vehicle as belonging to Coors and began a search of the area that turned up Coors' hat, glasses, and a blood stain. The following day, his wife Mary received a ransom note in the mail requesting $500,000 for his safe release. The hunt for Coors and his assailant was the largest FBI effort since the Lindbergh baby kidnapping.