Arsenic

I should've known something was wrong when my dad started getting sick.
My Stepmother is evil and for many weeks, she poisoned him with arsenic.
It was five years ago today when she finished him off with the final dose.
I hated my Stepmother even though Dad wanted the two of us to be close.
It took me a while to get it done but I was finally able to have Dad's body exhumed.
When high levels of arsenic were found in his body, my Stepmother was doomed.
I was determined to bring her to justice and I knew that I wouldn't fail.
She was found guilty by a jury and I was happy because justice prevailed.
The judge sentenced her to life in prison with no chance of parole.
I loathe that woman, I can never get back Dad's life that she stole.

(Even though this poem is fictional, many women really have killed people with arsenic.)