Grey Ghost Investigations - Private Investigator Fort Lauderdale. Grey Ghost specializes in surveillance. Our private investigators utilize the latest surveillance equipment and have been trained in the most modern surveillance techniques available. We strive to obtain the quickest, most efficient and most thorough results for our clients. In addition to surveillance, we also offer all types of background check reports, which are obtained from databases that are only available to license private investigators. Call us today for a free phone consultation! We are open till midnight. If you're looking for a private investigator, call Grey Ghost Investigations and find out how we can help!