On 17 April 1966, two Ohio deputies pursued a luminous object for about 86 miles.

Portage County matters because it is a named police pursuit of a luminous object.
Documented
Two deputies pursued a luminous object for ~86 miles
Documented
The chase is documented in CUFOS files
Debated
The identity of the object
Unverified
Extraterrestrial origin
Sources are kept in separate layers: official and contemporary material is documented; secondary UFO literature is treated as debated, not as primary evidence.
Documented source.
Secondary / debated material.
Secondary / debated material.