scientists worry it could be a sign the broken well is buckling under the pressure, which could make the disaster worse. phil keating is in hopedale, louisiana now. back to that employee, phil, he made the claim before but what are investigators doing about it now. >> he testified he's a bp well site leader working before the explosion 0 on the rig. he came back because he was called by by investigators trying to get more out of him to find out what bp knew and what it did. if there's a leak on any rig in the gulf, you are retired -- required by federal law to suspend operations immediately. clearly this did not happen because bp kept trying to close the well days leading up to the explosion. he says he noticed a leak at the blowout preventers, a hydraulic leak, in a control pod and passed it on to houston prior to