Hartford investigator lied to the cops about following me. Is this legal?

I have been recieving Hartford LTD for about 18 months. I was just approved for SSD. Hartford has sent an investigoator to my house, taped the entire 3 hour conversation and then sent a transcript of the whole thing to my doctor along with survelliance information they had obtained from following me months earlier. They asked my doctor to agree with their findings that I could work even though he has filled out 2 sets of forms already stating I cannot return to work permanently. Here is the big issue I have with them. While they were following me, I noticed a strange guy following me and I got creeped out and called the cops. He lied to the cops and told them he was not following me or wasnt an insurance investigator and didnt know what they were talking about. The cops investigated him for 2 days and told me to let them know if I saw him again. I was so freaked out I had to go to my doctor and he diagnosed me with PTSD (on top of my disabling heart problems). I got a concealed weapons permit and was afraid to leave the house. The survelliance report recently sent to my doctor states that the investigator admits being contacted by the police but could not disclose he was actually investigating me as to not compromise the investigation. Is this legal? I wouldnt even know except for the fact that my doctor told me because he knew how freaked out I was from the situation and felt I should know. I have heart problems and this situation was devestating to me.