i personally believe the guy for a couple of reasons...
his name was found in the Los Alamos phone book after they said he didn't work there...then they grudging admitted that he worked there in a lower capacity. So which one got caught lying the government or bob lazar?
he made his report to a local credible journalist...and he is no longer interested in giving interviews. So he is not trying to profit from it.
Element 115 is striking similar to Xerium 525 described in the German Die Glocke 'wonder weapon'.
his descriptions of the method the engine operates on is similar to current publicly available research in superconductors and gravitation fields. http://en.scientificcommons.org/21769780
The majestic 12 documents show a high level of interest by the government in back engineering of alien technology. Even if the outside documents are a fake...We found a memo referencing the MJ12 special investigations unit in the national archives...stamped and in a box of unrelated documents (oops) so the mere existence of these 'interest groups' give huge amounts of creditability to his story.
just my opinion.