Nigeria's dumbest criminal!

I read this stroy and didnt know whether to cry or laugh.
How can someone be so evil and so stupid at the same time???
Please read:

A 30-years-old housewife, Rukayat Alalade, has been arrested by men of the Nigeria Police Force, Oyo State Command, for  macheting her 11 years old stepson to death.
It was gathered that the suspect, whose husband Lukman Alalade, married after he separated from his first wife, had always haboured ill-feelings for her two stepchildren.
According to sources, the dastardly act was committed on Valentine’s Day after the boy, identified as Qudus, returned from an errand on which his stepmother sent him. Angry that the boy was late in coming from where she sent him to buy kerosene, the suspect reportedly descended on him with a machete. She reportedly cut him on the head and hand until he gave up the ghost.
After accomplishing her mission, Mrs. Alalade dragged the remains of the little boy to the backyard of the family’s building and hid the cutlass under the bed.
Her wicked deed was, however, blown open when the husband came back and could not see his son. Though she initially denied knowledge of the deceased’s whereabouts, a trail of his blood was followed to where his body was eventually discovered at the backyard. It was then that bloodstains were noticed on the woman’s cloth, while the cutlass was found under the bed in the couple’s room.
The suspect has been transferred to the State Criminal Investigation Department (SCID) for further investigations and prosecution.

I dont know which upsets me more - the fact that she was so demonic to another human being (her stepson) or the fact that she was a dumb ass demon.
I mean "drag the body to the backyard and hide the cutlass under the bed"? She should be charged with murder in the 1st degree as well as stupidity in the 1st degree! The 2 charges should get her spending the rest of her life in jail! Oshi!