A dispute over the failure to say "thank you" after a door was held open escalated Tuesday into a series of arguments, a fatal shooting at a Dallas shopping center, and the arrest of a 22-year-old woman on a murder charge, police said.

Police say Keona Hampton shot and killed 41-year-old Cecilia Simpson in the parking lot outside a PetSmart following a verbal and physical altercation that began at a nearby Five Below.

Shooting reported at shopping center

Officers responded to reports of a shooting around 1 p.m. Tuesday at the Wheatland Towne Crossing shopping center in the 2500 block of West Wheatland Road.

Simpson had been shot multiple times and was taken by Dallas Fire-Rescue to Methodist Central Hospital, where she was pronounced dead, authorities said.

Hampton left the scene bef

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