The Deputy will appreciate that criminal investigations are properly dealt with by An Garda Síochána in the first instance and it is not open to me, as Tánaiste, to intervene in individual cases. That being said, I would recommend that the person in question makes contact with their local/nearest Garda station as soon as possible to outline the situation to Gardaí directly. Alternatively, and if this person so wished, they could contact An Garda Síochána by using the Garda Confidential Line, Tel: 1800 666111, which provides a ready means of communicating information to the Gardaí anonymously.
To be of assistance, I have arranged for a copy of the Deputy's question, and this reply, to be sent to the Garda authorities for their attention and whatever action deemed necessary.