http://www.targeted-individuals.com/gang-stalking-1/4567965106

"Usually before Gang Stalking begins the targeted individual may at first be placed under covert forms of surveillance. The person will probably be monitored 24/7. Foot patrols and vehicle patrols maybe used to follow the individual as well as electronic means as part of the monitoring, psychological profiling process. Once the psychological profile is complete, the Gang Stalking can commence.

Gang Stalking generally originates from when a covert investigation is opened on an individual and teams of plain clothes police officers, citizen informants/snitches and snoopers are deployed to obsessively harass the targeted individual usually to an extreme degree."