What is Backberend?

Legal Definition
Sax. Bearing upon the back or about the person. Applied to a thief taken with the stolen property in his immediate possession. Bract 1, 3, tr. 2, c. 32. Used with handhabend, having in the hand.
-- Black's Law Dictionary
Legal Definition
The carrying of the stolen goods with him by a thief.
-- Ballentine's Law Dictionary