WASHINGTON - Striking an increasingly aggressive posture as the Deepwater Horizon disaster enters its second month, the Obama administration said Tuesday that it had begun civil and criminal investigations into the massive oil spill in the Gulf of Mexico.
"If we find evidence of illegal behavior, we will be extremely forceful in our response," Attorney General Eric Holder said in New Orleans after viewing damage caused by the widening spill, which he described as "heartbreaking to see."
Holder said he believes there is "sufficient evidence for a criminal investigation" into the spill, which has halted fishing in nearly a third of the Gulf's federal waters, tainted shorelines and spread across an area with a 200-mile radius in the Gulf of Mexico.
Justice Department lawyers are examining whether the companies that owned and operated the Deepwater Horizon rig in the Gulf, which include BP and Transocean Ltd., violated an array of federal statutes that contain criminal and civil penalties, including the Clean Water Act and the Endangered Species Act.
On Wall Street, the Dow Jones industrial average fell 120 points shortly after Holder's announcement as energy stocks dropped. BP lost 15 percent of its market value.
After six weeks of failures to block the well or divert the oil, BP was using robotic machines to carve into the twisted appendages of the crippled well. The latest attempt involved using tools resembling an oversized deli slicer and garden shears to break away the broken riser pipe so engineers can then position a cap over the well's opening.
Even if it succeeds, it will temporarily increase the flow of an already massive leak by 20 percent -- at least 100,000 gallons more a day.
"It is an engineer's nightmare," said Ed Overton, a Louisiana State University professor of environmental sciences. "They're trying to fit a 21-inch cap over a 20-inch pipe a mile away ... using little robots."