A private investigator who was arrested in Wisconsin two years ago claimed he was hired by Church of Scientology's head to spy on his 79-year-old father.

The Southern California-based church's leader David Miscavige spent $10,000 a week over 1½ years to spy full-time his elderly father Ronald Miscavige Sr.

Dwayne Powell told police that David allegedly spent $10,000 per week on him as he feared that his father would reveal negative information about the controversial organization.

Miscavige was allegedly followed around for 18 months by two detectives. They secretly placed a GPS tracking device on his car to track and photograph him where he went.

They also spied on his conversations at restaurants, regularly searched through his garbage and taped together torn up papers so they could read the content.

This truth came out following the arrest of Powell on July 30, 2013 in West Allis, Wisconsin. He was arrested after police received a call about suspicious activity in the neighborhood. Powell was found with four handguns, two rifles, hundreds of rounds of ammunition, a stun gun, and a silencer.

Powell claimed that his 21-year-old son was hired full-time by the Church of Scientology to follow the elder Miscavige. He also revealed that the firm Terry Roffler and Associates subcontracted him.

Detective Nicholas Pye wrote in the police report, "He explained that Ron and his younger wife, Becky, left the church and David is worried that they will divulge details about the church's activities and that their job was to know who Ron talked to, emailed with, met with, where he went, what he did, etc".

When his main client David Miscavige was reached by the Los Angeles Times, he denied the claims of hiring him and called the investigator's statements a baldfaced lie.