A court in Georgia has heard, a man accused of killing his young son by leaving him in a hot car was responsible for the boy's death but it was not intentional.

Justin Ross Harris wept as his lawyer argued the tragedy in Georgia two years ago was due to a change of routine. Mr Harris forgot Cooper was in the back seat of his SUV that morning because he had usually dropped him off at nursery by that time, the court heard.

While, the prosecution said the defendant plotted to kill his son.

But the defence team attempted to dispel that notion while admitting the death of the 22-month-old toddler was the father's fault.

Maddox Kilgore said the jury in his opening statement, that, "Ross Harris is responsible for his child's death. It's his fault, no doubt about it."

"What you're going to see here at this trial is that being responsible is not the same thing as being a criminal."

Mr Kilgore said: "His sexual behaviour isn't some kind of motive to murder the person he loved more than anyone in the world."

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Nandini