Lori Vallow murder trial day 11: Son of 'Doomsday mom' testifies

The trial of Lori Vallow, the so-called "Doomsday mom" accused of killing her two kids, resumed on Tuesday in Idaho.

Vallow, who used to live in Arizona, is accused of murder conspiracy in the deaths of her two kids, J.J. Vallow and Tylee Ryan. She's also facing murder conspiracy in the death of her husband’s previous wife, Tammy Daybell.

There was tension in the courtroom as the only living child of Vallow took the stand.

Colby Ryan stayed in the Valley when his mom and siblings moved to Rexburg, Idaho.

On April 18, Colby testified, and told the prosecution how Lori would not tell him where the family moved to. He said he would text his sister Tylee, but the responses didn't sound like her style of talking.

MORE: Lori Vallow's only living child, Colby Ryan, takes the stand in trial of his siblings murders

Last week, the jury heard testimony from law enforcement, including an Arizona detective and Lori's former best friend. Zulema Pastenes, the widow of Lori's brother, Alex Cox, finished up her testimony on April 18 before Colby Ryan, Vallow's son, took the stand.

MORE: Lori Vallow's cousin says the discovery of JJ's and Tylee's remains was 'not surprising, but horrifying'

The trial is being held four hours away from Fremont County, where the bodies of her kids, J.J. and Tylee were found. The judge on the case decided in order to find a fair and impartial jury, the trial venue should be moved to Boise in Ada County, the largest county in Idaho with about 25% of the state’s population living there.

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Murder, Money and the End of Days: The Lori Vallow story

Murder, Money & the End of Days. Why investigators believe religion, greed and an affair led an all-American mom on a trail of death. This is the Lori Vallow story. FOX 10’s Justin Lum walks us through the crucial timeline on the eve of Vallow’s trial.

For all previous and extensive coverage on this case, visit https://fox10phoenix.com/vallow + watch the in-depth special here.