Its was November almost December 2009. I was about 17 or 18 i was in a car leaving my fathers girlfriend house of the time with my dad driving, my brother in the back sit and me in the passenger sit and we where leaving the city of Dorado, Puerto Rico it was 10pm. I started to see out the window when i saw a black triangle it was sort of like a shadow moving in straight-line no sound no lights. At the same time a Black helicopter was fallowing very slow after it, it look like and escort. I lost the object cause the car was moving, two minute pass and another black helicopter flew by bought this one was going fast. At first i immedlty taught that it was a actually a sort of small plane bought it was going to slow to be a plane. I don't know what i saw but that was my event.