Evidence that Eric killed himself a few minutes before Dylan

I read it and it does bring a lot of info together, but I disagree that Dylan continued shooting at police after Eric killed himself.

What I truly believe is it was a simultaneous suicide, with Eric sitting against the bookcase and Dylan kneeling in front of him.  They both did it at once and from his position, Dylan fell onto Eric's leg and then rolled over onto his back.  They lit the cocktail before doing this and it burned down after they were already dead.  I know it gives no credence to the theory, but I can see it actually happening this way in my mind.