Impossible to say just from your summary. Theoretically, it could even be written as a comedy (you will probably know if it's not a comedy).
The genre doesn't depend on a short summary/logline, it depends on the angle you are approaching your material from.
Of course, in most cases the topic kind of defines the genre - but you can't say for sure, and can't say exactly. Obviously, it seems to be around thriller/drama/suspense in your case.