Christina Parcell's Sister

Prior to the start of the trial, the judge ruled that jurors would not be allowed to hear that investigators had allegedly found a high volume of child pornography on Post's electronic devices, or that he was facing charges of sexual exploitation of a minor.

Prior to the start of the trial, the judge ruled that jurors would not be allowed to hear that investigators had allegedly found a high volume of child pornography on Post's electronic devices, or that he was facing charges of sexual exploitation of a minor.

The medical examiner testifies to just how violent the attack appeared to be.

The medical examiner testifies to just how violent the attack appeared to be.

Next, a court-appointed attorney for the child in the custody dispute takes the stand to address the conflict that prosecutors say is at the heart of this case.

Next, a court-appointed attorney for the child in the custody dispute takes the stand to address the conflict that prosecutors say is at the heart of this case.

At the time of the murder, remember, John Mello was still in Italy. And that, prosecutors say, is why Mello needed Zach Hughes.

At the time of the murder, remember, John Mello was still in Italy. And that, prosecutors say, is why Mello needed Zach Hughes.

But because Zach Hughes had deleted those encrypted WhatsApp messages before authorities got his phone, when they were able to retrieve them, they came back scrambled.

But because Zach Hughes had deleted those encrypted WhatsApp messages before authorities got his phone, when they were able to retrieve them, they came back scrambled.

When I spoke to John Mello prior to Zach Hughes's trial, he told me about sending this message.

When I spoke to John Mello prior to Zach Hughes's trial, he told me about sending this message.

But prosecutors argue at trial this is when John Mello convinced Zach Hughes to help him in that alleged campaign of harassment against Christina, sending those explicit photos from a supposed escort website.

But prosecutors argue at trial this is when John Mello convinced Zach Hughes to help him in that alleged campaign of harassment against Christina, sending those explicit photos from a supposed escort website.

The most significant communication between the two men, prosecutors say, was their last WhatsApp message sent just hours after Christina Parcell was killed.

The most significant communication between the two men, prosecutors say, was their last WhatsApp message sent just hours after Christina Parcell was killed.

There was a text exchange between you and Zach where you ask him, how's the music research going?

There was a text exchange between you and Zach where you ask him, how's the music research going?

And some people think that could be code for how did the murder go?

And some people think that could be code for how did the murder go?