David Stoneham, 55, was killed in the driveway of his home in the 500 block of West Troy in north Houston.
His 17-year-old daughter says she saw the whole thing go down.
She told cops her stepfather, 45 year old Alain Bell, shot Stoneham multiple times with a shotgun then fled in his truck.
Cops spotted Bell Tuesday afternoon driving on 610 near South Main Street, a day after filing charges.
They chased him for a bit but eventually got him.
Stoneham was a 33 year veteran of the Houston Fire Department. With that and a key witness, Bell could be looking at some serious jail time.