cop (v.) Look up cop at Dictionary.com
1704, northern British dialect, "to seize, to catch," perhaps ultimately from Middle French caper "seize, to take," from Latin capere "to take" (see capable); or from Dutch kapen "to take," from Old Frisian capia "to buy," which is related to Old English ceapian (see cheap). Related: Copped; copping.
cop (n.) Look up cop at Dictionary.com
"policeman," 1859, abbreviation of earlier copper (n.2), 1846, from cop (v.).