On Wednesday, however, BP's Chief Executive Tony Hayward said he had not been informed that BP is the subject of a criminal investigation.
But in a letter sent Tuesday to Sen. Barbara Boxer (D-California), the chairman of the Senate Committee on Environment and Public Works, Assistant Attorney General Ronald Welch appears to confirm that the incident is still being treated by the government as a civil matter.
Boxer and six other senators who are members of the Environment and Public Works panel wrote to Attorney General Eric Holder May 17 requesting that he launch a "inquiry" to determine whether BP lied to the federal government about whether it could adequately respond to oil spills in the Gulf.
The company has also been accused of publicly lying about the volume of oil that began gushing out of the deep sea well, which government geologists now estimate could be five times higher than BP's own assessment.
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