Lise Han, a former member of the cabinet of PS Senator and former Tours' Mayor Jean Germain, talks to journalists during the trial of the so-called "Mariages Chinois" (Chinese Wedding) case at the court in Tours on April 7, 2015. [Photo/CFP]

The trial centers on alleged kickbacks linked to 750,000 ($815,000) that Tours spent to lure Asian visitors between 2008 and 2011, officials said. The city splashed out tens of thousands of euros on such expenditures as a stand at the Shanghai World Expo in 2010 and sending a delegation of dozens of representatives to China, one defense lawyer said.

Germain, 67, was facing charges including misuse of public funds, according to court documents, though not of benefiting financially himself. Han and her associates were the main suspected beneficiaries of the plot. As mayor for nearly two decades until 2014, Germain presided over the weddings and spoke publicly about the broad media coverage of them.

The city's effort to lure Chinese newlyweds ended after the suspected wrongdoing came to light.

According to court documents, Han alleged she had had an amorous relationship with Germain. Lawyer Gerard Cebron de Lisle, who is representing the city in its effort to recoup some of 500,000 in estimated losses, said Germain never admitted to that claim.

The drama has echoes of the death of former Socialist Prime Minister Pierre Beregovoy, who shot himself with his bodyguard's gun in a forest near his home in 1993 - following a blistering electoral loss and the disclosure that he had received an interest-free loan from a businessman who was later jailed on corruption charges.

In a phone interview, Germain's defense lawyer, Dominique Tricaud, called his client "a martyr of the republic who was thrown to the dogs" - an allusion to a similar comment by former President Francois Mitterrand at Beregovoy's eulogy.

State prosecutor Jean-Luc Beck, in comments broadcast on BFM-TV news channel, said there was little doubt Germain killed himself, noting that a colleague of Germain's had found the note that indicated that he could not stand the thought of facing trial over the case.

Prime Minister Manuel Valls said he believed that Germain would have had the strength to face the trial.

"Clearly, I don't know the deep reason, the intimate life, of this man who decided to make this terrible choice," the Socialist premier told on i-Tele TV. "Today is a very sad day ... I lost a friend."