Mom of Utah grief author accused of poisoning her husband also possibly involved in his death, affidavit says

The mother of a Utah grief author awaiting trial for allegedly poisoning her husband was also possibly involved in the man's death, a newly released court affidavit revealed. 

The Summit County Sheriff's investigator wrote in the affidavit it is "possible" that Lisa Darden, the mother of Kouri Richins, was "involved in planning and orchestrating" Eric Richins' death.

Investigators discovered Darden had been living with a female romantic partner who died suddenly in 2006. An autopsy determined the woman died of an overdose of oxycodone, the affidavit said. The woman struggled with drug abuse, but at the time of her death she wasn't in recovery, which the investigator said would "likely rule out the possibility of an accidental overdose." Darden had become the recipient of the partner's estate shortly before her death, the affidavit said.