Greg responds...

First off, what makes you think he didn't report back?

Secondly, for the sake of argument, let's say he didn't. What exactly did he have to report back at that stage? That Beast Boy was still tired and grieving after his trip to Mars? That he accepted Andi's offer to cover his chores? That when confronted he made it clear that he was basically all right - just a bit tired - and that he'd pick up the slack on his chores? Is any of that damning evidence of anything at all? Especially to an untrained non-professional when dealing with a legal adult?