Well, I'll be one of the contrarians apparently and I'll go my grave believing there was a conspiracy, and Oswald was certainly not acting on his own. I can see his patsy statement as believable, or at the very least, can buy Starman's comment that the machinery was put in place to allow this to happen by higher powers.
Has it been proved? I guess that would be a negative. But just way too many strange occurrences to allow me to come to the conclusion a guy who was allowed to flit back and forth to Russia during the height of the Cold War pulled the trigger on his own (from a window I believe that wasn't even the best shot/sightline to complete the kill on the 6th floor) and then he conveniently gets snuffed out two days later by a guy with mob ties who is allowed access to walk right in and take him out.
Not to mention the inconsistencies in the doctors reports from Parkland vs Bethesda, the frickin' magic bullet, a lot of people related to the event dying unusual and early demises, et cetera et cetera.
I've seen both of the documentaries mentioned above, and as assuring as they are in stating there is no conspiracy, there are a number of good books (High Treason by Groden and Livingstone, Crossfire by Marrs to name a couple) that at the very least should leave one very uneasy accepting the solo Oswald theory as fact.
You can go ahead and fit me for my tinfoil hat--I'm comfortable in how I feel about this event and what I believe really happened.