Well, we know Alex managed to shoot Charles in the chest twice, but it's a lot harder to hit someone in a moving car, than someone standing in a living room. I would like to know where Alex was on Oct 2nd. Since Charles Vallow's car was used in the attempted murder of BB, the list of people who would have access to the car is presumably quite limited. Did that car made it to Rexburg and then back to Arizona? If so, list of people who could have used it would be even more limited. Which really makes it hard for me to understand why police couldn't solve that crime. Especially considering the shooting is reportedly on surveillance video, and thus can't be passed of as self-defense or natural causes.
You have a crime on video, you know car is registered to a man who is dead (thus couldn't be driving it). The person being shot it is a husband of Lori's niece, so not likely some random dude stole the car and is going around shooting at people.
If you can't solve that crime, what can you solve?