1. Taking evidence from a crash site is a criminal offense. Who is that reporter and his company to be trusted in the final instance? Imagine tomorrow some strangers are knocking the door of the investigation team office, one carrying pieces of Р-73, another one of Python-5, and the third one bringing pieces of Patriot.
2. Even if it is finally proved that it was Buk (quite likely, IMHO), this actually says little about the rascals who pressed the buttons. The separatists had a single launcher (likely damaged) while the Ukrainian army had several Buk batteries along the MH-17 route on that tragic day (satellite data were widely published shortly after the crash), then disappeared quickly (which, as well, proves nothing alone).