There were all kinds of things which were really suspicious about the JFK assassination. Despite that I think Oswald probably acted alone.
If there was a conspiracy, it was most likely the Mob.
I’m confident that Oswald did not act alone, if he was a shooter, and believe that there was more than one shooter. If Oswald was the only shooter, I think he would have fired on Kennedy as the limo was driving North on Houston Street directly toward the book depository building. The fact that Kennedy was shot after the limo made a left turn onto Elm Street and was going away (West) from the depository tells me that that area between the depository and railroad trestle was an ambush “kill box”, where multiple shooters would insure a kill. I base this on having driven the route and my military experience and training in settling up ambushes.