Removed the wet spot drywall in tv room ceiling. Found the abs drain line for master tub. Had client turn on water to see where leak was coming from. The leak occurred further up in bathroom area, not accessible from below. Further removal of tub tile to attempt to get access to it and find the leak. Found the abs below to be intact and no cracks at time. We can attempt to removal tile but do not know what’s behind it, possibly tub removal. Hard to say at this time.