She married Ross Harris May 7, 2006, in Tuscaloosa where her husband worked as a police dispatcher from June 10, 2006, to May 22, 2009.

Leanna spoke at Cooper's funeral in Tuscaloosa, calling her baby boy "perfect" and saying that she would not trade "mommy time" for "the world."

"I miss my son," she said, "and I will miss him forever."

Wife can be compelled to testify against husband

Five days before Cooper died, authorities say Ross Harris twice viewed a video posted on YouTube in which a veterinarian demonstrates the dangers of leaving someone or something inside a hot car.

Leanna Harris told police that she had recently seen a story on a state initiative aimed at reminding people not to leave children in cars and that doing that was a fear she had, Stoddard testified.

In some criminal cases, a spouse cannot be compelled to testify against the other. However, in Georgia, if the charges allege wrongdoing involving a minor, a husband or wife can be forced to testify against their spouse.

The case and the death penalty

In Georgia, the child cruelty charge carries a penalty of five to 20 years behind bars. If Ross Harris is convicted of murder, he could get life, life without parole or the death penalty. If a person commits a felony and that act results in the death of someone -- whether it's intended or not -- that person can be charged with felony murder.

A murder can qualify for the death penalty in Georgia if it was "outrageously or wantonly vile, horrible, or inhuman in that it involved torture, depravity of mind, or an aggravated battery to the victim," according to criminal attorney Philip Holloway, who has served as a legal commentator about the case on CNN.

In order to meet that threshold, the evidence will need to demonstrate more than criminal negligence. The current warrant is merely a preliminary charging document. The district attorney can upgrade the charges when the case is presented to the grand jury for indictment, he said.

The Harris' church calls for 'justice'

On Sunday, Stonebridge Church in Marietta -- where the Harris family attended -- presented a sermon asking that the congregation pray for "truth and for mercy and for justice."

"Many continue to ask just how to love on Ross and Leanna right now," a minister can be heard saying in a sermon posted online. "I would say micro level, very close, it's all of the same stuff. Legally, all of that's out of our hands.

"We're just praying for truth and for mercy and for justice," the sermon continued. "Those are attributes of God, and we're just praying, continuing to pray through this whole legal process that those three things would be evident. That's God's character, and you can pray confidently for truth and for justice and for mercy, and I would say relationally, for opportunities to love them, whatever that looks like."