Milberg and its co-counsel sought to reassure a federal judge on Friday that it did not violate court rules by including statements by two confidential witnesses in complaints against Sony Corp. that did not hold up in subsequent depositions.

In a response to Southern District of New York Judge Robert Patterson Jr.’s demand for an explanation, Milberg and two other firms said that while their lawyers were equally “surprised by the testimony” of its witnesses, the firm believed their allegations were accurate when it included them in the complaints.