The Harris County Sheriff's Office responded to a welfare check at around 4 p.m. on 19770 Clay Road.
Deputies believe the incident happened at around 8 p.m. on Friday.
Authorities say the man and the woman were from Cuba, and were married for nine years and living separately. They were identified as a 48-year-old man and a 52-year-old woman, according to HCSO.
Investigators say the husband shot his wife to death based on the placement of the gun, which he then turned the gun on himself.
Investigators believe it may have been a murder-suicide.
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