Deputies found the repairman shot to death after family members said they were worried when he didn't come home from work, according to the sheriff's office.
According to HCSO, investigators learned that the suspect allegedly shot the victim because he reportedly owed him money.
HCSO said an 18-wheeler was unloading cinder blocks when it was hit by a vehicle and lost its load. Deputies say the crash has been cleared and the road has reopened.
HCSO said that the man suffered a self-inflicted gunshot wound and was pronounced dead at the scene. Deputies say they found the woman, who was the man's girlfriend, dead inside the apartment.
According to the Harris County Sheriff's Office, the inmate experienced an unknown medical emergency before he was taken to the hospital, where he later died.