I just saw this article on MSN and searched around unsuccessfully for any unbiased details of what happened in the case. Every single one of them sounds as if it was written by her defense attorney.
This is a good article. Especially this following paragraph.
Lucio’s supporters say many of the issues in her trial trace back to the head prosecutor in the case, Armando Villalobos. The former Cameron County district attorney recently spent several years in federal prison for bribery and extortion. At the time of Lucio’s trial, Villalobos was running for reelection against a challenger who criticized him for not thoroughly investigating or prosecuting charges of child abuse. Lucio’s attorneys say Villalobos wanted to make an example of Lucio to prove he was tough on crime.
https://www.npr.org/2022/04/22/1094156659/melissa-lucio-execution-texas