A woman was critically wounded when she was shot outside a Walmart store on Indianapolis' north side Friday afternoon.The shooting happened just after 2 p.m. at the store in the 3200 block of West 86th Street.Police said they think the victim, Paula Stubblefield, 38, was gunned down by Sabrina Manley, 22, the girlfriend of her ex-boyfriend, Jamar Boyd, 29.Stubblefield's 4-year-old child was with her at the time, and her 14-year-old son was in the store when the shooting happened."You have someone that has no regard for human life, or the lives of children," said Indianapolis police Sgt. Paul Thompson. "(They) put the children and everyone else in this parking lot at great risk."Police said the incident began when Stubblefield parked her vehicle behind Manley's vehicle and refused to move."A confrontation ensued, at which time Boyd tried to intervene," Thompson said. "Manley then produced a pistol and shot Stubblefield in the neck."Stubblefield was taken to Methodist Hospital in critical condition, but she is expected to survive, police said.Manley was arrested on charges of aggravated battery and criminal recklessness.