Русско-англо-русский юридический словарь

mainour (also manner). Law. A stolen object found in the possession of a thief when arrested. Chiefly in "taken (also found) with the mainour". (Oxford Living Dictionaries)

A thief caught in the act was killed without trial; a thief caught with the goods was subject to a trial and at most to the payment of monetary damages. (Rethinking Criminal Law)

MAINOUR. In criminal law. An article stolen, when found in the hands of the thief. A thief caught with the stolen goods in his possession is said to be taken “with the mainour,” that is, with the property in manu, In his hands. 4 Bl. Comm. 307. The word seems to have corresponded with the Saxon “handhabend,” (q. v.) In modern law it has sometimes been written as an English word “manner,” and the expression “taken in the manner” occurs in the books. (TheLaw.com Law Dictionary)

The auction website eBay, being easy to reach for the average thief, is a popular location for e-fencing; customers reported more than eight thousand crimes from the website in 2008, many of which involved the sale of stolen property. (Wikipedia)