A play on the phrase "all the signs were there", commonly meaning that there was enough obvious evidence of an issue that an observer should have been able to notice it before it explicitly manifested itself. if an employee of the road department is stealing, and their theft includes road signage, which they are keeping at their house, then quite literally "all the signs were there".
My friend was fired from his job at the road department for stealing . I have to say I saw it coming . The last time I was at his house all the signs were there .