Harris County Sheriff's Office deputies said they responded to the 27000 block of Kendal Ridge at about 6:20 p.m. after receiving a call of someone being shot.
Deputies said a man had called his ex-wife to discuss picking up a belonging from the home on Kendal Ridge but allegedly made idle threats over the phone.
The man then showed up unannounced with a rubber mallet, smashed the home's ring doorbell camera, and took it back to his car, HCSO said.
Investigators said the ex-wife's brother confronted the man before shooting him.
Officials said the ex-husband was transported to the hospital, where he was pronounced dead.
According to an earlier tweet by Sheriff Ed Gonzalez, the ex-husband was allegedly upset about the division of property during divorce proceedings.