Ten years have passed since Jackson graduated from Memorial High School to his stay at the Salvation Army Harbor Light in Houston, which started in April. Just days ago, he was arrested there, charged in Flores' murder.
The 27-year-old served in the Marines until 2011. His social media posts the past couple of years show messages from a troubled man who even reached out for financial help on a GoFundMe page after he said he had reached a plateau in his life and wanted a fresh start.
In February of 2014, he said he shot himself in his knuckle and was exploring PTSD treatment and added he was having trouble finding a job.
On his Facebook page, some friends consoled him at times as he vented in his posts two years ago about the direction of his life.
On April 8, 2014, he posted, "I've been homeless for 20 plus days now. Why? It's just something about life that isn't going well. Maybe I'll last longer."
"I wish someone could kill me and get me out of this nightmare life. What horror story,' he added in a post on April 15, 2015.
On July 26, 2014, he posted, "I have nothing happy or positive to say about my life right now. Only used to bes."
A friend encouraged progress a couple of weeks later, posting on August 10, 2014, "I'm glad to hear you are doing better."
But any progress seemed short lived after a post on September 5, 2014, saying "I swear I want to kill everybody."