Police spokesman Randy Vaughn says police on Monday arrested two men, ages 47 and 48. Their names have not been released pending formal charges.
Two day care employees took the child and 14 other children to the restaurant following a field trip.
Buckingham’s body was found in her home nearly three days after she was shot. Her 2-year-old daughter was dehydrated and asleep beside her.
Detectives say several people were involved in the shooting.