I am not sure how this constitutes a blooper or a hoax or anything else. It's a bundle of news reports within 24 hours of the shooting, while facts are still being collected and various newsmen are getting information or even misinformation from people who seem to know something.
After complicated horrific events like this, in which many witnesses are traumatized or highly suggestible or unwilling to talk, it may take weeks or even many months to sort out all the details correctly.
As a rule of thumb you get the most accurate information in the first 24 hours after an event - BEFORE the spin machine cranks up into high gear. That does not guarantee that every piece of reportage is accurate, but it is less likely to be outright "spin". Und vee all know vhat spin is - a euphemism for LIES.
My own experience with such events, which goes back at least to the JFK assassination, is quite the opposite. Early on a lot of rumors, and people repeatingt rumors as if proven fact, and some amateurish theories or impressions also being spoken of as if proven fact. Later, after some serious crime scene investigation and measurements, the truth comes out ... belated and often in drips and drabs.
Funny you should mention the JFK hit. As it so happened my parents had just moved and I was staying at my Aunt's house as I was not yet back in school, and watched the shooting live on Tee Bee. I was watching as the bullet hit him in the head from the front, and it was clearly a frontal shot. However, another day for that argument.
However, I did carefully weasel word my comment i.e., that NOT ALL early reports are valid. My point is simply that you are more likely to get uncensored raw data in the first 24 hours. It may take weeding through it, cross checking and validating, but usually there will be a handful of reports that were reasonably accurate, and more important neither censored nor tailored. This is particularly true in the case of a staged event or one involving government misdeeds.