Oklahoma women get prison terms for violent crimes

That means 6.64 women per 100,000 of the state's total population are in prison for killing someone. Nationally, that number is 4.07 women per 100,000 of the U.S. population, according to U.S. Department of Justice and 2010 census data.

It could mean Oklahoma has more female killers per capita than other states, or the state simply prosecutes more homicide cases involving female offenders, said Tulsa County prosecutor Doug Drummond.

About 33 percent of Oklahoma's female prison population is serving time for violent crimes, with murder and manslaughter most common. Child abuse is next with 122 women currently serving sentences for such crimes.

Oklahoma has made national news in recent years for several high-profile cases of child abuse or neglect, which resulted in the death of a child.

In November, police were called to a Bartlesville apartment where Maggie May Trammel, 10 days old, died after going through a washing machine cycle. Her mother, Lyndsey Dawn Fiddler, is charged with child neglect, but additional charges could be filed when the medical examiner's report is complete, authorities said.

In 2008, Vicki Leigh Chiles was convicted in Tulsa County of murdering 2-year-old Joshua Minton by placing duct tape over his mouth and hands at the home day care she operated, obstructing his breathing and causing him to choke on his own vomit.