Federal officials have filed new fraud and conspiracy charges against the former head of Department of Veterans Affairs medical centers in Cleveland and Dayton, who is accused of taking bribes from businesses seeking more than $1 billion in agency contracts.

William D. Montague, 61, took payoffs either directly or through the consulting company he created in 2008, the House of Montague, in exchange for inside information on future construction and other contracts, according to the federal indictment announced Wednesday.