FBI trying to determine who owns letter written by Jackie Kennedy in 1968 . Letter passed from collector to collector , but widow says she gave it to no one . Comment: DALLAS , Texas ( CNN ) -- Son Thomas Nuckols told authorities he found it among the papers left by his father .
FBI trying to determine who owns letter written by Jackie Kennedy in 1968 . Letter passed from collector to collector , but widow says she gave it to no one . Comment: Son Thomas Nuckols told authorities he found it among the papers left by his father .