How often do you go on errands with your children?

How often do you leave them alone, strapped in car seats while you go in to visit?

For hours. That's what happened when a young mom, Brittany Valesquez, leaves her two-year-old son in ten-month-old daughter, strapped in car seats and where else?

Arizona. You know how hot it gets there? I don't know how many lizards live there.

110, 120 degrees. You know the rest. The children are dead. And is it Totemom? Redue. Totemom all over again.

Deja Vu. She claims the baby sitter did it. I'm Nancy Grace. This is Crime Stories. Thank you for being with us.

Brittany Valesquez, a young mom now suspected in counts of murder in the deaths of two children, a two-year-old little boy and a ten-month-old little girl.

The children were found dead. At night time, on Monday night, dead in a car parked in the driveway of the family's home in Superior.

Now, as of right now, police are not saying how the children were killed. Yes, there's a chance that they were strangle, that they were shot, that they were killed by blunt object.

Likely no. They likely died of heat stroke. Arizona authorities say the mother of the baby in toddler found strapped in the car seats is identified as Brittany Valesquez.

Right now, we're not exactly sure about the circumstances surrounding this, but joining me right now. Lauren Howard's psychologist joining us out of New York, Ashley Wilcott, juvenile judge and founder of Child Crime Watch dot com DNA expert George Sqiro.

And Larry Mayher, Crime Stories Investigator reporter Larry, thank you for being with us. Let's just take it from the top. What happened?

Here's what police in Superior say, Brittany Valesquez told them that she had left the children at this house inside the car while she went to work for the day.

And when she returned 14 hours later, the children were still in the car and were dead. She claims that she was leading the children there for a babysitter to pick up.

And at this point, she claims the babysitter never showed up to get the children. I think I know who it is. I think it's Zanada Gonzalez. She went on the run after she murdered Tottenham Casey Anthony's daughter, Kelly.

And I think she has surfaced now in Superior, Arizona. You know what? Some of the facts I have are bass acquires. Let's get it straight, Larry Mayher.

Now, the main fact I had was correct that she was driving and she leaves the children there in the car. Or did she say she took them in the home and went to work? I thought she went to visit someone.

No, she went to work at a restaurant and had had a 12 hour shift at the restaurant. She told police that she left the children in the car strapped in their car seats.

And they were still strapped in their car seats and still wearing the same clothes when she returned 11 o'clock that night to pick them up.

So she leaves them there. How does she get to work? She has another vehicle that is taking her to and from work.

You mean she hitched a ride or there's another vehicle parked at the house? That wasn't clear.

She has access to two cars. One and her grandmother was driving one of them. And apparently her grandmother gave her a ride to work.

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