David Schassler, a Global International Security Services Investigator, utilizes only professional, state-of-the-art equipment, including the latest High-Tech video systems, producing quality documentation in all types of weather and lighting conditions. You will always receive crisp, clear photographs and video.

David will work closely with your attorney whenever possible. David Schassler, former New York Police Detective understands the needs of his clients.

Information Resources:

When you need information quickly, G.I.S.S. can assist by obtaining critical information. Below, you will find a few of these services. If you do not see specific information, just ask for it!


We offer the most up-to-date means of survelliance, providing crisp, clear, video or still photographoy which is accompanied by an official detailed report.

We offer all these services and much more, just call 800-668-8116
to speak with a local representative.