It happened in Stagecoach, Texas, about 40 miles northwest of Houston.
Police say 59-year-old Stagecoach officer Robert Lee was arrested early Saturday for the shooting death of 57-year-old Harris County Deputy Rocky Lee.
Robert Lee initially said he shot and killed a suspected burglar in his home, but detectives now believe Rocky Lee was checking on the welfare of his brother.
Investigators are calling this a domestic situation.
According to the Montgomery County Sheriff’s Office, Robert Lee was booked into the Montgomery County Jail and his bond was set at $500,000.
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