Major points off for biased approach and conclusion-selective delivery. For example; using a known propagandist like Priscilla McMillian without revealing her connections to US intelligence organizations is a dishonest trick to play on an uneducated viewer.
The film indeed raises more questions about how or why Oswald would have committed the crime for which he has been accused than it ever answers. Indeed, it seems to be leading clearly to the conclusion that he could not have done it, and then, seeming to have realized their "error", they pitch in the unsubstantiated Walker accusation, the fake backyard photographs, and all join together to reach a conclusion entirely unsupported by the evidence they have presented. This is especially low yellow-journalism for a show with Frontline's prestige.