Convicted husband killer Kouri Richins was so hellbent on taking down her foes from behind bars that she enlisted her family to smear the lead cop in her Utah murder case , prosecutors revealed.

Richins — the 35-year-old Kamas mother who fatally poisoned husband Eric Richins — attempted to launch false criminal, civil and public accusations against Eric’s family and law enforcement even after she was arrested, according to papers filed by prosecutors ahead of her Wednesday sentencing .

Kouri Richins allegedly tried to smear law enforcement and the family of her husband who she killed.…