R.D.
I've been through this as well. These CPS workers are SO used to BS calls!! Trust them on that. They know when a malicious call has been put in. He can get in trouble for repeatedly wasting their time... let him dig his own grave. Don't pressure your son to talk about what they discussed if he doesn't want to. Maybe put the shoe on the other foot, and have CPS talk to your ex instead. Such a waste of everyone's time and mental energy! And so not fair to your son :(