![Kouri Richins](https://assets2.cbsnewsstatic.com/hub/i/r/2023/06/29/bc4093e2-2775-413d-a42e-466f08a02c72/thumbnail/640x360/ac56ec61fb34e2ee05d4494bd813ae94/cnn-l19jb21wb25lbnrzl2ltywdll2luc3rhbmnlcy9szwrllta2nmq0otk1yzqxmmriymu4mwnjzti0ytninduwmmfi-l19wywdlcy9ox2vkzwmznjvlzjixytu4mzhlowyyognmmgi1ytm5zja5.jpg?v=631cf5f2b4e8db7f9bc428589402864d#)
Mom of author accused of poisoning husband also had partner who died of overdose
Investigators said in newly unsealed court documents it was "possible" that Lisa Darden, the mother of Kouri Richins, was "involved in planning and orchestrating" Eric Richins' death.