This is just my opinion, but.........TA's friends said that TA was working with his church (I also heard he'd gone to his Bishop) to straighten out his wandering ways, ie his sexual relationship with JA. It appears TA caught JA lying to him so he sent her the final kiss off notes around 5/25 or 5/26, JA's grandpa's 25 went missing on 5/28, and he was murdered on 6/4.
I've also heard from TA's friends on the talk shows that for quite awhile JA thought SHE was going to go to Cancun with TA, but then they broke up in April, or she decided to move back to California and KNEW that the Mexico trip was just in a few days and JA THOUGHT the girl he was taking was the ONE (ie TA wanted to marry and SHE wanted to marry him.) JA didn't know that it had already been agreed that the girl going was going JUST AS A FRIEND. She didn't find that out until AFTER she killed TA.
The most DANGEROUS time in an abusive relationship is at the final break up. You put that in there, he was outting her to all of HIS friends and church and employer (they both worked for), he was going away on a romantic vacation with his intended (she thought), .................... She HAD to kill him! She just had to!...... If she couldn't have him, NO ONE would.
So she stabbed him, cut his throat, and for good measure, shot him in the head like the story he'd told over and over and over, of the previous encounter he'd had looking at death's door.
JMHO
fran
PS.... fwiw, seeing a young love abusive relationship starting to develop, I learned that often times the abuser will constantly cause drama! Many times they break up with their target, only to come back a short time later and say they changed their mind. But the constant back and forth can cause such havoc, the target will sometimes declare at the end of yet another break up, 'They've had it! No more.' When the abuser realizes this time they really did it, they start stalking until ................ fran