Leanna Harris’ husband, prosecutors alleged Thursday, had two sides: Churchgoing family man and another, darker persona, one that compelled Ross Harris to knowingly leave their 22-month-old son to die, locked inside a sweltering SUV. 
 
 Based on her own, sometimes confounding words, along with evidence disclosed at her spouse’s probable cause hearing Thursday, many are wondering whether there’s another side to Leanna Harris. 
 
 >> RELATED: Prosecutors: Father was sexting while child sat in hot car 
 
 The 30-year-old dietitian, who two years ago moved to Georgia from Tuscaloosa, Ala., has not been charged with any crime. But police have disclosed that, like her husband, she had researched children dying in hot vehicles prior to her son Cooper’s death, telling officers it was her “worst fear.” On average, 38 kids die each year after being trapped inside automobiles, according to KidsAndCars.org. 
 
 Investigators described her behavior the day of her son Cooper’s death as odd, if not suspicious. 
 
 When informed by workers at her son’s day care facility that Cooper had never been dropped off, she calmly responded, “Ross must have left him in the car. There’s no other explanation,” according to Cobb County Police Det. Phil Stoddard’s testimony Thursday. 
 
 Then, when reunited with her husband at police headquarters after he had been charged with murder, Leanna Harris asked him, “Did you say too much?” according to Stoddard. 
 
 “There isn’t enough to make her a co-conspirator … yet,” said criminal defense lawyer Esther Panitch. 
 
 >> RELATED: Photos: Dad accused in son’s hot car death appears in court 
 
 Kelly J. Huff / Pool / Marietta Daily Journal / AP Leanna Harris, wife of Justin Ross Harris, the father of a toddler who died after police say he was left in a hot car for about seven hours, looks on during her husband's bond hearing in Cobb County Magistrate Court on July 3, 2014, in Marietta, Ga. Harris, who police say intentionally killed his toddler son by leaving the boy inside a hot SUV, was exchanging nude photos with women the day his son died and had looked at websites that advocated against having children, a detective testified Thursday. At that same hearing, a judge refused to grant bond for Harris, meaning he will remain in jail. 
 
 Whatever Leanna Harris’ role winds up being in this case — witness, defendant or supportive wife — prosecutors and the public are taking note of her public actions. What they’ve seen so far is stoicism that seems at odds with what has become a public tragedy. 
 
 She has expressed little emotion throughout. At Thursday’s hearing, she stared blankly ahead, chewing gum as prosecutors delivered one bombshell after another. 
 
 When she called home June 18 with the grim news of Cooper’s death, her mother could be overheard on the phone: “Why aren’t you crying? Why aren’t you reacting?” 
 
 View Larger Focus shifts to mother of toddler in hot car death 
 
 Her response, according to Stoddard: “I must be in shock.” 
 
 Then there was her eulogy at Cooper’s funeral last Saturday in Tuscaloosa. To those who don’t know her, Leanna Harris’ comment that she wouldn’t bring her son back, even if she could, seemed suspicious. 
 
 >> RELATED: Police: Father who left child in hot car charged with murder 
 
 “He’s in the most peaceful, wonderful place there is,” Leanna Harris said. 
 
 But the 250 or so mourners who gathered at University Church of Christ gave her two rounds of applause, and Harris’ statement is not unusual among the deeply religious who believe the afterlife is God’s greatest gift. 
 
 Still, it’s clear, according to veteran legal observers, that police are looking at Leanna Harris’ potential culpability in her son’s death. On Thursday, Cobb County District Attorney Vic Reynolds said the investigation continues and “much work remains,” though he offered no details on where the probe may be headed. 
 
 “Knowledge of a crime isn’t prosecutable. A cover-up is,” Panitch said. 
 
 But if, as many increasingly believe, her husband ends up facing more significant murder charges, prosecutors may seek to use Leanna Harris as a witness. In Georgia, the spousal privilege shielding a wife from testifying against her husband, and vice-versa, doesn’t apply in cases of domestic violence or death of a child. 
 
 >> RELATED: 'I’ve killed our child,' dad screams over tiny body 
 
 “She needs to make a deal before the state finds more evidence against her,” Panitch said. 
 
 So far, Leanna Harris has remained loyal to her husband of seven years. At Cooper’s funeral, she said she holds no anger toward her husband. 
 
 “Ross is and was a wonderful father,” she said. As Ross Harris listened from jail on speaker phone, his wife told him, “I love you and I’m doing this for you.” 
 
 It’s unclear whether Leanna Harris knew then of her spouse’s “sexting” habits, first disclosed publicly during Thursday’s hearing. Friends and family shielded her from reporters as she left the courtroom and insist she’s a woman of strong faith who treasured her role as wife and mother. Ross Harris’ half-brother, Randy Michael Baygents, a police officer for nearly two decades, said Thursday had Ross Harris been released on bond he would have returned home. 
 
 “What you saw here is what is truly in her,” the Harris’ pastor, David Eldridge, said at Cooper’s funeral. “There is an example here for all of us on how to deal with things.” 
 
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 Her eulogy was part memorial, part confessional. 
 
 “Some of you might wonder how I’m standing here today and I ask myself the same question,” Leanna Harris said. “I should be crumpled into a pile of tears and snot on the ground. (The Lord) is standing behind me, holding me up.” 
 
 She spoke of her difficulties getting pregnant and her awkward teen years. 
 
 “Junior high and senior high — they weren’t the happiest times (for me),” she said, listing heartbreaks her son would be spared. “He won’t have to suffer through the death of his (grandparents). He won’t have to suffer through the death of me and Ross.” 
 
 In his closing prayer, Eldridge said, “I’m not sure there’s a better testimony to who You are or what You do than Leanna.” 
 
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 More popular and trending stories ||||| (CNN) Leanna Harris, the mother of a Georgia toddler who died locked in a hot car, has told authorities that she researched such deaths and how they occur, according to a police affidavit. 
 
 Her husband, Justin Ross Harris , the child's father, who is in jail without bond, has also told police that he used the Internet to research child deaths in vehicles and what temperature it needs to be for death to occur, police said. 
 
 "Justin stated that he was fearful that this could happen," the police affidavit said. 
 
 In the document released Sunday, police say that during questioning Leanna Harris "made similar statements regarding researching in car deaths and how it occurs." 
 
 The time frame for when this alleged research took place remains unclear. 
 
 JUST WATCHED Timeline of toddler's death in a hot car Replay More Videos ... MUST WATCH Timeline of toddler's death in a hot car 02:35 
 
 Their son, Cooper Harris, who was 22 months old when he died June 18, was buried after a funeral Saturday in Tuscaloosa, Alabama. 
 
 Leanna Harris emphatically told a crowd at her son's funeral she loves and stands by her husband, even though he is charged with murder in the child's death. 
 
 "Am I angry with Ross?" Leanna Harris said Saturday. "Absolutely not. It has never crossed my mind. Ross is and was and will be, if we have more children, a wonderful father. Ross is a wonderful daddy and leader for our household. Cooper meant the world to him." 
 
 Police said Justin Ross Harris told them he forgot to drop his 22-month-old son at the day care center before going to work. The boy died after spending seven hours in a child safety seat in the back of an SUV. 
 
 Harris was arrested hours after his son's death and has pleaded not guilty to charges of murder and second-degree child cruelty. 
 
 The affidavit was filed in the application for a search warrant used to seize computers from the Harris home. 
 
 A timeline of events 
 
 On the day Cooper died, his father stopped for breakfast at a fast-food restaurant and afterward strapped his son into a rear-facing child restraint seat on his SUV's back seat, police said. 
 
 He drove to his workplace, a Home Depot corporate office, about a half-mile away. He works as a Web designer there. 
 
 Usually, he would take his son to an on-site day care. But that day, police said, Harris left him in the car seat. 
 
 During his lunch break, he returned to his car, opening the driver's side door to put something inside, police said. 
 
 After work, around 4:16 p.m., the 33-year-old father got in his car and drove away. A few miles away, he stopped the car at a shopping center and called for help. 
 
 When it became clear Cooper was dead, Harris was so inconsolable police had to restrain him. 
 
 "What have I done?" he wailed as he tried to resuscitate the boy. 
 
 The Cobb County medical examiner's office found the child's cause of death "consistent with hyperthermia and the investigative information suggests the manner of death is homicide," according to a Cobb County Department of Public Safety statement issued last week. Temperatures hit 92 degrees Fahrenheit on the day of Cooper's death. 
 
 The medical examiner's office is waiting for toxicology test results before making an official ruling as to the cause and manner of the toddler's death.
– Leanna Harris—unlike her husband—has not been charged in the death of her 22-month-old son in a hot car but investigators are puzzled by some of her behavior. Police say she had done online research on children dying in hot cars and on the day her son, Cooper, died, she calmly said, "Ross must have left him in the car. There's no other explanation," after being told he had never arrived at day care, the Atlanta Journal-Constitution finds. When she was briefly reunited with her husband at the police station, police say she asked him "Did you say too much?" Some of her remarks at her son's funeral also raised eyebrows. As her husband listened in from jail, she said she wouldn't bring Cooper back even if she could. "He's in the most peaceful, wonderful place there is," she said. The 30-year-old has shown little emotion at court hearings and legal experts aren't sure whether she will end up being charged as a co-conspirator or used as a witness against her husband, which Georgia law permits in cases involving the death of a child. In other developments: Horrifying details of the boy's death emerged at a bond hearing a few days ago, reports the New York Daily News. A police officer testified that the little boy had desperately struggled to free himself from the car seat inside the hot SUV. Scratch marks on the boy's face and abrasions on the back of his head are signs of a frantic effort to get out of the seat. Search warrants released the next day stated that the belts were at the tightest setting. At the same hearing, it emerged that Justin Ross Harris had exchanged explicit messages and photos with six women as his son baked to death. Investigators say Harris appeared to be trying to cover his tracks on all three computers he used, and they have only "scratched the surface" in their search for deleted files. "People think 'Well, this is a cell phone. Once I delete a picture or text message or my contacts, it's gone,'" a computer forensics expert tells NBC 11. "No. Even when you hit 'reset' on your phone, that information is still stored on that hard drive."