(often followed by `of') not knowing or expecting; not thinking likely; "an unsuspecting victim"; "unsuspecting (or unaware) of the fact that I would one day be their leader"
You can use unsuspecting to describe someone who is not at all aware of something that is happening or going to happen. The co-defendants are charged with selling worthless junk bonds to thousands of unsuspecting depositors. his unsuspecting victim. not knowing that something bad is happening or going to happen