Baltimore County Executive Johnny Olszewski Jr. issued a statement calling it a "horrific and a heartbreaking loss of life."
"The family permitted the relationship, and there are photos of the family throwing a baby shower for the victim and the suspect," the Tulsa Police Department said in the Facebook post.
The woman was arrested for child neglect, hit-and-run, and resisting an officer.
Sarah Whitney Ganoe, 35, has been charged with second-degree murder, malicious wounding and two counts of felony child neglect.
The allegedly neglected four-year-old girl had lost so much blood that she was given four transfusions.
Tavon Ford, 31, was taken into custody by the United States Marshals Fugitive Task Force without incident.
Mary DeRonda, Charles DeRonda and Jeremy Cook were taken into custody in Oklahoma following a month-long investigation, police said.
John Hernandez, 41, and Natasha Dabbs, 37, were taken into custody after the boy said he had been forced to stand in a closet as punishment.
The Bexar County Sheriff's Office said it is investigating after residents reported that a boy was seen walking without shoes and his hands cuffed in San Antonio.
Police officers responded to a report of an unresponsive child in Flagstaff, Arizona, and began life-saving efforts, but the child was pronounced dead at the scene.
Rafael Loera, 56, and his wife Maribel Loera, 50, were arrested after the skeletal remains of the girl were found.
Authorities said Ericka Campbell, 23, went to visit a private spa at a home in Warren, leaving three children in a locked car outside.
Tiffany Alberts told police she was trying to get her son moved to a different unit at the hospital where she thought he would receive better treatment.
Officers had been sent to the residence in Edgewater, Florida, for a well-being check on the three juveniles.
After their malnourished son was rushed to the hospital on Wednesday, Robert Buskey, 31, and Julia French, 29, were arrested and booked into Brevard County Jail on a charge of child neglect with great harm after an investigator with Department of Children and Families intervened.
The anonymous caller told police Chyna was intoxicated and unable to take care of her two-year-old daughter.
Parents allegedly didn't check on the 10-month-old for 17 hours.
Medical staff found healed whip wounds showing it wasn't the first time he had done it.
His father refused to call 911 for four hours.
Two other children living at the home are now in the care of relatives, the Florida Department of Children and Families said.