A police detective has testified Scott Peterson rented a private mailbox the day before he reported his wife missing.
Two weeks later, Peterson got a letter there from his mistress, Amber Frey.
Richard House´s testimony emphasized the prosecution´s contention that Peterson´s love affair was his motive for the murder of his pregnant wife, Laci.
But then prosecutors suffered another setback.
House testified he found some of the Petersons´ wedding pictures in a wastebasket in a storage unit.
When he was asked on cross-examination whether he thought the pictures were being thrown away, House said no.
It was the second time in a week a prosecution witness — a detective — shot down a prosecution theory.
Last week, a detective testified tests on a plastic pitcher indicated it was not used to make cement anchors.