On the heels of an investigation into a missing iPhone prototype, Apple is reportedly adding to its security staff to help protect it from counterfeiting and theft.

The company is searching for two managers to ramp up its “new product security”, according to a report by the Associated Press, joining an already tight security program that includes personnel who used to work for the FBI and other law enforcement agencies.

The quest for additional security measures follows the San Francisco police department’s investigation into the role officers played in a search by Apple for a missing unreleased (iPhone 5?) prototype, according to news reports that suggest Apple employees may have impersonated police, TechZone360 reported.

Members of the police department and two Apple employees apparently questioned Sergio Calderon, 22, after an Apple employee lost the handset at a San Francisco tequila bar, CNET reported.

According to the AP, four San Francisco police joined two Apple staff at a home in Bernal Heights to search for a missing prototype, believed to be the upcoming iPhone 5.

The phone was believed to be in possession of an Apple employee who was field-testing the new device. Apple reportedly located the phone at the Bernal Heights home using GPS technology and called San Francisco police. An Apple spokesman declined to comment, according to CNET’s report.

The tech giant has remained tight-lipped, according to news reports. “Apple declined to discuss its security operations in detail with The Associated Press, in keeping with the company's longstanding reputation for secrecy,” the report said.

But Jim Stickley, co-founder of corporate security consulting firm TraceSecurity, told the AP that once a new device has “reached the point where employees are field-testing it, a competitor who obtained one wouldn't have enough time to analyze it and do anything to take advantage of that insider knowledge.”