The Crown has delivered its final arguments in the trial of Emil and Rodica Radita, who are both charged with first-degree murder in the death of their teenage son.

Alex Radita, 15, died of starvation and complications of untreated diabetes in 2013.

On Wednesday, the defence argued that in order to prove first-degree murder, the Crown would have to prove both planning and intent, but said the Crown had done neither, and the judge should only consider convictions for manslaughter or criminal negligence.

Court has heard over the course of the trial that the Raditas did not believe that their son was a diabetic despite the boy needing to be hospitalized for the illness.

Alex was previously placed into protective custody in a B.C. foster home after his parents failed to take care of his condition, but a judge later returned the boy to his parents.

On Thursday, the Crown told the court that Alex was doomed and trapped by the "two people with the power to save him."

"What little life he was allowed in the end was marked by pain, by sickness and by a profound loneliness that must come from knowing the world is not for you," Crown prosecutor Susan Pepper said Thursday. "The Crown respectfully submits that it has proven all of the elements of first-degree murder in this case beyond a reasonable doubt,"

The defence is expected to deliver its closing arguments on Friday.