Award winning journalist Aram Roston tells of his experience as a subject of a private investigation gone wrong. Morse was quoted in this story and spoke at length with Roston about his background and why he should be concerned about being followed. Although we do not exactly know why Roston was being followed, it points out the concept of just how a private investigator could be used as a tool for intimidation.
See Aram Roston’s article here
https://www.vocativ.com/01-2014/tailed-private-investigator/
https://web.archive.org/web/20140210042350/https://www.vocativ.com/01-2014/tailed-private-investigator/
(update: Vocativ has switched to video only content, and the articles have been removed. The link is now to Aram Roston’s original article via archive.org.)