UFO Report:
“The 1973 UFO Chronology – A World-Wide Wave” (NICAP.org)
The following chronological list of UFO sightings contains several UFO sightings by law enforcement officers:
http://www.nicap.org/waves/1973fullrep.htm
Chief of Police Wilfred Clark and police officer John Tucker sighted a UFO over Mount Vernon, Indiana on 2 November 1973, at 10:37 p.m.
Mount Vernon, Indiana
(wikimedia.org photo)