A cautionary tale circulating through the cybersphere warns readers not to pull over for unmarked cars with flashing red lights because it is the work of criminals masquerading as police in targeting lone motorists as victims. According to myth-busting site www.snopes.com [3], that tale may be a mix of both fact and fiction.
Links:
[1] mailto:cdeppen@zitomedia.net
[2] http://www.ridgwayrecord.com/sites/default/files/IMG_2729 COLOR_32.jpg
[3] http://www.snopes.com