So Haisch did an univited fifteen minute conference presentation? Big deal. Doesn't make the man any more credible on this subject. Of course, what's interesting is his association with the "California Institute for Physics and Astrophysics." It doesn't really exist. Its an office and a website - nothing more. It sounds fancy, but its just an empty suit.
The man bases his claims that we are currently being visited by E.T. upon his belief that our "friends" travel via wormholes and branes. And you find that more "convincing.?!?"
Here is his paper:
http://www.ufoskeptic.org/JBIS.pdf
Sorry but, the man is a crackpot. Perhaps a smart crackpot. But a crackpot just the same.