@Ualtar be very well prepared for your discussion with the gardaí. Write everything down before you go down to your appointment. Specific details, dates / times / events etc., you will be making a statement so be 100% accurate in everything you say...
Best of luck with it all - this is a nightmare to be going through...
Also, with advances in technology, I wouldn't be surprised if you found additional listening (or even image recording) devices. Some of these things are quite small & easily hidden. Personally, I would be going through every square inch of each and every room looking for such devices.
I have a two pages word file with all dates, times and events.
While he was here, we sort of freaked out thinking everything was being recorded. It is/was a horrible feeling open your house in good faith for someone you think you know and at the end you have all these problems to handle it.
Thanks God he made a mistake draining my internet connection and everything came to the light. Otherwise, we would probably still be living with him.