I don't believe the FBI instructed Indiana troopers to look at BK's hands.
Why? Hands are hands...They are not evidence of a crime
Wounds would have healed after 6 weeks
Even if there were wounds, it would not prove anything.
Sure seeing wounds makes one suspicious, but pulling someone over to check for 6 week old wounds?
The quality of the images obtained by the officers was so poor that you can't tell whether he has any wounds on his hands. It just doesn't make sense.
This isn't a case where you see drugs in a vehicle.
Additionally, why would the FBI suggest this? This was Indiana's case.