A lawyer whose wife embezzled $1.4 million, including more than half a million dollars from a Virginia Democratic lawmaker, was arrested Monday for his own alleged role in the scheme.

David Miller, 68, of Fairfax faces 12 counts of wire fraud, bank fraud, money laundering and identity theft in Alexandria federal court.

He and his wife, Linda Diane Wallis, stole money from the campaign of Virginia Senate Minority Leader Richard L. Saslaw (D-Fairfax), an airline and a nonprofit autism organization, according to prosecutors.

Wallis, 51, has already admitted to the fraud schemes and was sentenced last year to 56 months in prison.

She worked as Saslaw's campaign treasurer from June 2013 to September 2014. During that time, she wrote 73 checks totaling $653,000 from the state senator's campaign account to fake law firms she admitted setting up with her husband. Saslaw declined to comment on the case Monday.

Wallis also acknowledged stealing $368,400 from her husband's then-employer, an aviation company called SkyLink with offices at Dulles International Airport. Miller was the company's general counsel and chief compliance officer from June 2011 through May 2014.

Miller sent bills to SkyLink from two fake law firms, according to Assistant U.S. Attorney Uzo Asonye, pretending to be outside lawyers named L.A.M. and Donald Straile. He even gave Straile a fake assistant, Emily Doyle, and a bookkeeper, Robyn, prosecutors said. At one point, Robyn forwarded Miller a message from Straile saying it was "great seeing you last night at the Kaine event" and musing about growing old.

In fact, all three people were either Miller or his wife, according to Asonye.

"How did we rack up 15,000 in credit card bills," Miller wrote to his wife at one point in 2014, six days before Wallis sent one of the fake law firms $8,500 from Saslaw's campaign.

The two also took money from a charity they co-founded, the Community College Consortium on Autism and Intellectual Disabilities, according to court documents. The nonprofit organization's ostensible goal was to lobby for funding for colleges serving people with autism and intellectual disabilities.

Wallis already has admitted putting $482,000 raised for the charity into her family's bank accounts.

According to prosecutors, she and Miller used money from the charity to pay their mortgage, renovate a Bethany Beach, Del., vacation home, and rent a lavish villa on the Jamaican coast that came with a full staff, a private pool, a tennis court and a three-hole oceanside golf green.

Miller entered a plea of not guilty on Monday and will appear in court again on Friday. He faces up to 20 years in prison. Attorneys for Miller declined to comment.

Laura Vozzella contributed to this report.