China Arnold was accused of killing her 3-week-old daughter in a microwave oven in Dayton, Ohio, on Aug. 30, 2005. Investigators said the baby, Paris Talley, was burned to death in the oven after Arnold and her boyfriend had an argument over who the child's biological father was. Arnold was sentenced to life in prison without parole Sept. 8, 2008. Judge Mary Wiseman told Arnold during the trial, "No adjectives exist to adequately describe this heinous atrocity. This act is shocking and utterly abhorrent for a civilized society."
Casey Anthony, 23, is awaiting trial on first-degree murder charges in the death of her 2-year-old daughter Caylee. She has pleaded not guilty to first-degree murder. She has been in an Orange County, Florida, prison since the summer of 2008.
Caylee lived with her grandparents and her single mother, Casey. Caylee disappeared in June 2008, but was not reported missing until a month later. Anthony told police she left Caylee at the apartment of a babysitter named Zenaida Fernandez Gonzalez, and that both were missing when she returned. Police found, among other discrepancies in Anthony's story, that the apartment had been vacant for more than 140 days.
Investigators said Anthony repeatedly misled and lied to police in the course of their work. She was named a suspect in her daughter's disappearance and charged with the Caylee's murder in October 2008.
After a six-month-long search, remains of Caylee's body were found in Orlando, Florida, in December 2008.
Anthony is back in court this week for crucial hearings that could determine where her murder trial will be held next year and what evidence the jury will hear. A judge refused to rule out the death penalty and said he will leave it up to the jury to decide whether she should be sentenced to death if convicted of her daughter's murder.
Michelle Kehoe, 36, was sentenced to life in prison without the possibility of parole on charges of first-degree murder in the death of her 2-year-old son Seth, and an attempted-murder charge related to her 7-year-old son, Sean.
Kehoe and her sons were reported missing by her husband, Eugene Kehoe, after the boys and their mother reportedly left to go visit relatives in Sumner, Iowa, on Oct. 26, 2008. The next morning, Kehoe walked into the home of residents in Littleton, Iowa, and told them that her sons were in danger.
Seth was found dead outside the family's van. Autopsy results revealed the boy had died from severe cuts to his neck. His older brother, Sean, was found struggling for his life inside the vehicle and had suffered similar cuts.
According to the arrest warrant affidavit, Kehoe falsely claimed that her children had been abducted. "She stated that she couldn't explain why she had done it. She stated that she couldn't face anyone. She stated that she wanted to die or be locked up where she couldn't hurt anyone else," the affidivit read.
At the trial in October 2009, Kehoe pleaded not guilty. Her attorneys argued that she suffered from extreme mental illness. An Iowa jury heard a tape of her surviving son telling police how his mother covered his eyes, nose and mouth with duct tape, slashed his throat, and then did the same to his younger brother. On Nov. 5, 2009, she was found guilty of first-degree murder, attempted murder and child endangerment causing serious injury.
The Associated Press contributed to this report.