A senior partner in top management at failed Dewey & LeBoeuf indicated to jurors at the criminal trial of three former firm executives Monday that a probe of the now-defunct firm by the New York County District Attorney’s Office helped scuttle merger talks with potential suitors and led to its eventual collapse.

The witness, former executive committee member Richard Shutran, appeared to bolster the arguments of defense counsel for former Dewey & LeBoeuf chair Steven Davis, former executive director Stephen DiCarmine and ex-CFO Joel Sanders. New York prosecutors have alleged that the three lied to lenders and investors about the firm’s finances and engaged in numerous instances of accounting fraud.