Chad Daybell murder trial: Melanie Gibb, Lori Vallow's former best friend, testifies

BOISE, Idaho - Melanie Gibb, the former best friend of Lori Vallow, took the stand on Thursday to testify at Chad Daybell's triple murder trial in Idaho.

Daybell, the husband of the so-called "Doomsday Mom," is charged with killing Vallow's two children and his former wife.

Last year, Vallow received a life sentence without parole for the killings.

Nearly a dozen witnesses have testified at the trial, including a Chandler detective and an FBI forensic accountant.

The Associated Press (AP) contributed to this report.