Criminal Investigations: Can Law Enforcement Allow Citizens the Ability to Track Someone

My question involves police conduct in the State of: South Carlina This would include cell phone monitoring, landline VOIP phone monitoring. Tracking the vehicle that the individual drives. Using federal employees like people who work at DMV s, Post Offices, Package Facilities,etc If they can how long do these things last and what could be the potential fallout if these things wee occurring illegal in effort to keep secret a possible crime enterprise and massive fraud?

Criminal Investigations: Can Law Enforcement Allow Citizens the Ability to Track Someone