I see yor point Whitefang, but running over the family dog would not have sent her to prison.
She acknowledges taking medication for a frightening experience with panic disorder on two occasions. If you can find the information where John refers to her RX for this mild tranquilizer, please let us know. Is there evidence she combined it with alcohol?
If she snapped due to a paradoxical reaction to this RX coursing through her body, it seems unlikely that she would be able to regain her composure so quickly and then concoct a multifaceted scheme to conceal what she did. The power and the presence of a medication which would cause such impulsive rage doesn't vanish instantaneously.
If we agree on this, that mom and dad loved this little kid with all their hearts, and it seems as if we do, then her fear of incarceration is not top of the mind awareness. Crushing grief is all there is. Has anyone seen the made for television movie starring Danny Travanti, Adam, the true story of the murder of Adam Walsh? His, John Walsh's, reaction to the news of his boy's death, as portrayed by Travanti, is an extremely powerful and (to me) highly realistic account of a parent just learning of his child's murder. We all respond differently to tragedy. Yet, I think it is safe to say that the death of our own six year old child would render us in such deep shock and emotional pain, plotting a cover-up to protect us from a jail sentence is inconceivable. I realize that some parents are capable of such depravity. I believe that America is haunted and fascinated by the news of such horrors. Many of us have become open to the myth, even persuaded, that these kinds of behaviors are not that uncommon anymore. With a population of 300,000,000 people, the tiniest fraction of these unspeakable evils, plastered across our media, insidiously form the perception they occur frequently. They don't. Additionally, upon close inspection, tell-tale signs litter the family's landscape. They are conspicuously conspicuously absent here.
True, a dog's death will not send you to jail. I mention it is as hyperbole. I cannot visualize Patsy doing something so sick, even to a dog, you know?