Doesn't seem like Oswald killed tippet, the timeframe is to tight and the casings at the scene did not come from the gun Oswald had in the theatre, in fact the casings apparently came from 2 handguns if I.remember correctly from what I've read. However, it appears tippet did receive instructions to kill Oswald after the assasination and was witnessed frantically searching for someone by several witnesses around that time. It's also alleged that TWO people were arrested at the movie theatre, LHO being taken out the front exit and the other out through the rear but no more was.reported of this...possibly his handler? There's a witness on you tube testifying to this.... I realise sources I'm quoting aren't great but what is now?!