Did a dentist accused of murder poison his wife's protein shakes?

Angela Craig's autopsy revealed she had been poisoned. Police claim the evidence points to her husband James — alleging he purchased potassium cyanide and arsenic and laced her protein shakes with poison.

source https://www.cbsnews.com/news/james-craig-colorado-dentist-accused-murder-angela-craig-poison-protein-shakes-48-hours/