F.B.I. Arrests Volkswagen Executive on Conspiracy Charges

The Federal Bureau of Investigation has arrested a Volkswagen executive who faces charges of conspiracy to defraud the United States, two people with knowledge of the arrest said on Sunday, marking an escalation of the criminal investigation into the automaker's diesel emissions cheating scandal.

Oliver Schmidt, who led Volkswagen's regulatory compliance office in the United States from 2014 to March 2015, was arrested on Saturday by investigators in Florida and is expected to be arraigned on Monday in Detroit, said the two people, a law enforcement official and someone familiar with the case.

After a study by West Virginia University first raised questions over Volkswagen's diesel motors in early 2014, Mr. Schmidt played a central role in trying to convince regulators that excess emissions were caused by technical problems rather than by deliberate cheating. Much of the data presented to regulators was fabricated, officials of the California Air Resources Board have said.

Mr. Schmidt continued to represent Volkswagen after the company admitted in September that cars were programmed to dupe regulators. He appeared before a committee of the British Parliament in January, telling legislators that Volkswagen's behavior was not illegal in Europe.

Lawyers representing Mr. Schmidt did not respond to requests for comment late Sunday. Officials at the Justice Department also declined to comment, as did an F.B.I. spokesman in Detroit.

In a statement, Jeannine Ginivan, a spokeswoman for Volkswagen, said that the automaker "continues to cooperate with the Department of Justice" but that "it would not be appropriate to comment on any ongoing investigations or to discuss personnel matters."

Lawsuits filed against Volkswagen by the New York and Massachusetts state attorneys general accused Mr. Schmidt of playing an important role in the carmaker's efforts to conceal its emissions cheating from United States regulators.

Starting in late 2014, Mr. Schmidt and other Volkswagen officials repeatedly cited false technical explanations for the high emissions levels, the state attorneys general said. In 2015, Mr. Schmidt acknowledged the existence of a so-called defeat device that allowed Volkswagen cars to cheat emissions tests. More from Adam Goldman And Hiroko Tabuchi/NY Times