"That's the one thing that's really hard is just trying to process that," said Rachel Bruce.
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Her late husband, 44-year-old Lemuel "DJ" Bruce, was a 5-year arson investigator with the Houston Fire Department and a Marine Corps veteran who loved his family.
ORIGINAL STORY: Suspect who killed HFD investigator dies from self-inflicted gunshot wound
What led to HFD investigator's tragic death?
"Every chance he got he wanted to be home," said Rachel. "He didn't want to go out with the guys or anything."
He was the father of two children, a 12-year-old girl and an 8-year-old boy. That morning in October, when he never returned home, still plays in his wife's memory.
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His last call to service was on a night that was supposed to be spent at home.
RELATED:Grief-stricken Houston firefighters give testimonials about fallen arson investigator Lemuel 'DJ' Bruce
Grief-stricken HFD gives testimonials about fallen investigator
Lemuel was scheduled to be off that night, but his wife said he was determined to solve the case he was leading. It was an investigation into a serial arsonist setting fires in the Heights area.
Rachel said she and her husband went back and forth about whether or not he should go in to work. They finally decided it would be okay to work the shift, which was scheduled to start at 12 a.m. and end at 6 a.m.
By the time 6 a.m. came around, Rachel said she knew something was wrong the minute she heard a knock at her door.
"I knew right when they said, 'Rachel, it's HFD.' I knew right away," she recalled. "I kept holding my hands up saying, 'Wait a minute. Stop, stop.' You know when you're just in denial and shock, you don't want it to be true."
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The arson investigator had been shot hours before his shift was supposed to end.
SEE ALSO: Arson investigator was 1st in HFD's history to be killed in line of duty
What we know about arson investigator killed in line of duty
It was around 3 a.m. when he encountered the suspect he was looking for and was shot and killed. The suspect then turned the gun on himself.
On Wednesday, the Houston Fire Department planted a tree in the ground near the spot where Lemuel lost his life.
"It means a lot to know that they're dedicating something to his service and to his sacrifice," his wife said.
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