Derrick Marshall has been a private investigator for 30 years. Read about his many adventures as a PI and the techniques he uses to catch the bad guys. More important perhaps, you can learn how to be your own PI.
Derrick Marshall has been a private investigator for 30 years. Read about his many adventures as a PI and the techniques he uses to catch the bad guys. More important perhaps, you can learn how to be your own PI.