It's not about X5 but I'd like to ask if anybody knew or had a good security camera(small enough to hide somewhere) for outdoor?

I need one for my house. I don't have a garage . I have to park my car on drive way. One day, in the morning, I found that someone put black color stuff on my hood. Fortunately, it was raining day so the black thing whatever it was not dried. Still, I spent a good hour to clean that up. Think of it now, the black thing was something that used in road. But pattern of black ink(let's call it ink because I don't what that is but It's not ink) was somebody's work. I should have taken picture of it.

This is second time, I think it's time for me to find out what that person is.

Thank you.