I received my experience in detecting threats to personal privacy during my experience with the LAPD. I worked a unit that worked closely with the secret service. We conducted VIP dignitary protection details that required debugging.
If you are worried that you are being investigated, call our office from a payphone preferably some distance from your home. Do not call us from your home telephone. We can search for bugs and cameras using various techniques, many of them transparent to those doing the monitoring.