Private Investigator Derrick Marshall shows you how to utilize cheap and effective devices to conduct covert surveillance of your home, office, or any other area that you need to keep tabs on. The …
Be Your Own Private Investigator
Through A Marshall's Eyes: Be Your Own Private Investigator
Private Investigator Derrick Marshall shows you how to utilize cheap and effective devices to conduct covert surveillance of your home, office, or any other area that you need to keep tabs on. The …