follow the money, if you can

 
when in doubt, follow the money
it is much harder to lie with money 
   how did the money get there
   what is the source of the money 
it is also much easier to frame someone with money (if you've got the money)
   first you have to get the money
   then, you probably should laundered the money to make it difficult to trace the original source of the fund
   financial transaction
      associated with a person
      associated with an activity (project based) (program)

additional methods
   follow the paper trail
   follow routine communication traffic 
   follow material flow or supply traffic (food, water, waste, air, ... )
   follow the person (in many cases with the mobile phone, assuming the person is always using the same deviceID# [[International Mobile Subscriber Identity (IMSI) numbers and Electronic Serial Number (ESN),[14]]] and ..., the roaming signal and the phone traffic can be proxy for the actual person; with technical sophistication, the deviceID# can probably be ghost, roaming data log be manipulated, and specific database entry can be modified, ( added, or deleted); signal vaccuum device, stingray, a linux box running a software acting as a cell tower; ... ...)

tracking and monitoring
   you can track what they used everyday, a transport, like a vehicle, a bike, a skateboard, a bicycle, a wallet, their belt, a watch, a pen, the mobile phone, a bag, a purse, a fanny pack, ... 
   if you have a published schedule, then ... 
   physical surveillance 

    https://en.wikipedia.org/wiki/Stingray_phone_tracker
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https://en.wikipedia.org/wiki/Stingray_phone_tracker

The StingRay is an IMSI-catcher, a cellular phone surveillance device, manufactured by Harris Corporation.[2] Initially developed for the military and intelligence community, the StingRay and similar Harris devices are in widespread use by local and state law enforcement agencies across Canada,[3] the United States,[4][5] and in the United Kingdom.[6][7] Stingray has also become a generic name to describe these kinds of devices.[8]

https://en.wikipedia.org/wiki/Stingray_phone_tracker  
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*5   Written by Steve Kangas and Ruppert Michael

     CIA has bought many domestic media companies. A prime example is Capital Cities, created in 1954 by CIA businessman William Casey (who would later become Reagan’s CIA director).
By 1985, Capital Cities had grown so powerful that it was able to buy an entire TV network: ABC. **1

     In 1984 ABC News was devoting serious attention to a CIA scandal in Hawaii connected to the investment firm BBRDW (Bishop, Baldwin, Rewald, Dillingham, and Wong). The BBRDW story was lifting a veil connected to money laundering, drugs, and the failed CIA drug bank named Nugan-Hand. Bill Casey and the CIA's general counsel Stanley Sporkin put extreme pressure on both the network and anchor Peter Jennings to stop their coverage. During the semi-public battle, ABC's stock dropped from $67 to $59 a share, and by December, the firm Capital Cities was trying to buy the network. Capital Cities successfully completed the buyout of ABC in March of 1985, after which the CIA conveniently dropped a suit against the network. **2
     Bill Casey had helped to found Capital Cities and had served both as its lawyer and as a member of its board of directors in the years between his service as SEC chairman for POTUS  Richard Nixon administration and as director of Central Intelligence for POTUS Ronald Reagan administration. ABC became known thereafter as "the CIA network." **2

2013, ABC is currently owned by Disney.

**1  http://www.huppi.com/kangaroo/L-overclass.html

**2  http://www.thirdworldtraveler.com/
                Ruppert_Michael/Motive_CTR.html
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