Victor Blackwell at the court
Scheduled to begin 1:30 p.m. ET
At the probable cause hearing a judge will determine whether there's enough evidence to support charges of murder and second-degree child cruelty against Justin Ross Harris. If prosecutors are successful in making their case to the judge, it will proceed to a grand jury, where the district attorney will seek an indictment.
Fewer than 10 witness are expected to be called, said Kim Isaza, a spokeswoman for the Cobb County district attorney. Police investigators are likely to take the stand, as well as possible character witnesses, all of whom will be subject to cross-examination.
Who is Justin Ross Harris?
CNN's Martin Savidge -- There's a sense that "something dramatic" could unfold in court today.
Philip Holloway, a criminal defense attorney, on CNN, says the probable cause hearing will reveal the "first glimpse" of what the prosecutors' case might look like.
Spectators are filing into the Cobb County courtroom and are taking their seats.
CNN spots suspect Justin Ross Harris arriving at the court in Marietta, Georgia. Leanna Harris, his wife, is in the courtroom, holding hands with another woman. It's standing-room only in the courtroom.
The chief magistrate has arrived and court is in session.
Justin Ross Harris was just sworn in.
Assistant District Attorney Chuck Boring is now questioning Philip Stoddard, a detective.
Stoddard says he's trained in child abuse investigations. He is now discussing the death of Cooper Harris. The cause of death is hyperthermia and the manner of death is homicide, he said.
Stoddard testified that Harris had plans to go see a movie June 18.
Justin Ross Harris would routinely take his son to a day care center before going to work, Cobb County police Detective Phil Stoddard said at Harris' probable cause hearing.
Stoddard said that when a witness was performing CPR on Harris' child, Harris walked around the other side of his car and got on his phone. Harris appeared to be talking on the phone, apparently telling someone his child had died, Stoddard said.
Det. Stoddard said that Harris told authorities that he routinely kissed his son Cooper after strapping the boy in his car seat in case the two got into a car accident and Cooper died. Harris told law enforcement that the father did that so Cooper would understand that his father loved him, Stoddard said.
Witnesses said Justin Ross Harris was erratic after taking his son out of his SUV June 18, sometimes yelling and screaming, and sometimes having a blank face and just standing, a detective testified at Harris' probable cause hearing. A witness told Harris they needed to do CPR, and when the witness started CPR, Harris went to the other side of the vehicle and made a phone call, Detective Phil Stoddard testified.
Justin Harris told police that he reached no one on his phone after taking his lifeless son out of his vehicle June 18, Detective Phil Stoddard testified at Harris' probable cause hearing. But police determined he made three phone calls, including at least one that went through -- a six minute conversation to the child's day care center, Stoddard said.
Det. Stoddard said that investigators reviewed surveillance tape from June 18 outside Justin Ross Harris' job. The tape showed Justin Ross Harris going to his car after returning from lunch with friends. Harris can be seen tossing inside his car a Home Depot purchase Harris made while out to lunch.
Justin Ross Harris received a "group e-mail" from a teacher at his son's day care center at 1:30 p.m. on the day that his son died in his hot SUV, Cobb County police Detective Phil Stoddard testified at a probable cause hearing. Stoddard didn't say what the e-mail said.
Before exiting his vehicle in the parking lot of his workplace on the morning of June 18 with his son still inside, Justin Harris reached to retrieve a computer bag in the front passenger seat -- and his son's head, poking out from a car seat in the back, would have been visible, Detective Phil Stoddard testified at a probable cause hearing.
The mother of Cooper Harris made out-of-the-ordinary comments when she arrived to pick him up at a day care center June 18, Cobb County police Detective Phil Stoddard testified at a probable cause hearing for her husband, Justin Ross Harris. Leanna Harris, after people at the center told her Cooper never was dropped off there that day, suddenly said, "Ross must have left him in the car," Stoddard testified. Witnesses said they tried to tell her many other things could have happened, but Leanna was, "like, no," Stoddard said