Utah mom accused of killing husband faces lawsuit over alleged home defects

Kouri Richins has been charged with murdering her husband by poisoning him with fentanyl.
Richins allegedly sold a remodeled home riddled with mold and other defects to a couple after her husband's death.
The couple who bought Richins' home say they've faced financial ruin and health issues due to undisclosed mold and defects.
Richins' family claims there is no direct evidence linking her to the fentanyl that killed her husband.
Prosecutors allege Richins changed life insurance policies and had marital issues before her husband's suspicious death.