I need a private investigator, I've been fighting CPS for over 2 years now

I just now found out during trial that my soon to be ex husband is testifying against me for the Foster parents, For 2 years now I have been clean and sober, I recently had a baby 11-09 of 2019
I was still living with my husband at the time because I swore It was his baby, Little did I knowThe whole time after we got married in April of 2018 he filed for divorce in May Because he finally admitted that he was miserable and I was too but he never trusted me from the beginning, Because he is an over thinker and still is. I need someone to help me get all the dirt I can on him I will pay please call me
Or send a reply
Sincerely,
BB
Because hes the kind of guy that if he thinks I'm doing it in his mind, its A FACT! Anyway, If anyone knows any retired private investigators or any Private investigators that could help me out I'd like to Tire one so that this person does not testify against me