He was slipping marijuana in the smoothies he was making her.
While investigating the circumstances surrounding the THC in his wife's system, police say they found messages between her and Narne in which the woman mentioned her drinks having a "bitter taste" in the months and weeks leading up to her death.
A review of the messages showed that Narne allegedly prepared the drinks for her, including coconut water and smoothies. Narne's wife indicated that the drinks had a "medicine taste" and "cough syrup taste," according to the affidavit.
When asked about these messages, Narne allegedly changed his story about his wife's marijuana use and described giving her marijuana "to help her sleep." Messages from the day of his wife's death suggested she was feeling unwell and that a smoothie Narne made for her "tasted off," per the affidavit.