If I am ever wrong, I'll be sure to let you know. There is nothing to support your notion that the jury thought Barajas was justified in killing Banda. Like Vball said, the prosecution failed to demonstrate murder beyond a reasonable doubt. And there was definitely an element of the "heat of anger" involved. The prosecutor likely overreached by bring a first-degree murder charge, when a manslaughter charge may have been more appropriate.
http://www.houstonchronicle.com/news/houston-texas/houston/article/Houston-news-5717059.php
The jury's acquittal of Barajas on Wednesday may have been a signal to prosecutors that the murder charge against the bereaved father was unduly harsh, said South Texas College of Law professor Geoffrey Corn.
Barajas denied shooting Banda, but Corn suggested the case was "like a classroom example of a 'heat of passion' case, which would have mitigated down to a manslaughter charge."
"The evidence was compelling" for a conviction, Corn said, but by seeking a murder conviction, the prosecutors had risked a jury backlash.
"I wonder what would have happened if they had started with a manslaughter charge," Corn said.