%0 Journal Article %T The helping hand of the law: Police control of citizens on request %A Mastrofski, Stephen D. %A Snipes, Jeffrey B. %A Parks, Roger B. %A Maxwell, Christopher D. %D 2000 %R 10.1111/j.1745-9125.2000.tb00892.x %P 307-342 %J Criminology %V 38 %I 2 %2 ISSN: 0011-1384