Apex Investigative Services was established in 1990 to provide the public with effective, high quality, and legal investigations. The founder of Apex Investigative Services, William Leighton, brings years of training and expertise to this investigative agency. As a former Maryland State Trooper, retail Internal Theft Investigator, and a Territorial Loss Prevention Manager, Mr. Leighton leads Apex in its operation as a full service agency. You can trust Apex with all your investigative needs.