Yes. There has been captures of the chupacabra there is also pictures. They have pictures bodies and hair samples. The next (and best evidence) Would be to capture a live chupacabra.
Maybe. http://chupacabre-found-in-barn.blogspot.com was a blog I found earlier that said he was found earlier and killed by rat poison. I'm not sure, you may want to check it out yourself.
Are you asking wether aliens are real or not? Thousands of people have recorded sightings of aliens, and many photos (some fake, some possibly not) have been taken whilst most have been edited. There...