On May 1, 1995, the number of calls and threats rose to a crescendo when a conservative radio personality known as Mark Shannon read the message on an Oklahoma City radio station, KRXO, then owned by Diamond Broadcasting. At this point, Zeran's house was placed under protective surveillance, and he was unable to use his telephone for his home business, as the threatening calls were coming in approximately every two minutes. This continued until at least May 15, by which time the number of calls reduced to only approximately 15 per day.