"Yes there is. Security footage, the officers on scene and reidence who lived on the street all witnessed it"
Right, there is security footage, but the one they gave to the public the day of, didn't show the actual RV.
Now, today, there's new footage clips of the RV and the explosion, and depending on which frame it's paused on, it looks like it's either 1) coming from the RV, or 2) coming from across the street, or 3) under the street.
I'm waiting to see more footage to confirm which direction the blast comes from, when video evidence can show.
It's difficult for me to take media's word for it.