Nurse was treating gunshot victim when she was killed in Arkansas mass shooting

Callie Weems was reveling in her new role as a mom in the months before a gunman in Arkansas fatally shot her at a grocery store.

Her daughter Ivy, now 10 months old, was a constant source of entertainment and wonder, Weems' mother, Helen Browning, 53, said in a phone interview on Sunday as she shared memories of her daughter.

Weems, 23, was among four people fatally wounded and another 11 injured - including the alleged gunman - in the shooting at the Mad Butcher store in Fordyce, Arkansas, on Friday, according to authorities. Just an hour before, Weems was marveling that her little girl had let her sleep in until 9 a.m. that morning.