This is Your FBI
Here is a sample of the online episodes currently available at The Old Time Radio Fan:
British Farm Equipment, Ltd.
1945-06-15 (6.6 MB) [28:51]
Car Theft Charles Meade
1945-06-22 (6.65 MB) [29:03]
The Stranger
1951-10-19 (6.87 MB) [30:01]
Citizen Caldwell
1951-10-26 (6.78 MB) [29:38]
The Traveling Bride
1951-11-09 (6.76 MB) [29:32]