Leo Apotheker found himself on the witness stand Monday over the disastrous 2011 acquisition that has come to define his brief tenure as CEO of Hewlett-Packard.

The 70-year-old German business executive testified that he would not have recommended that HP’s board proceed with the $11 billion purchase of U.K. software firm Autonomy had he known that it had misrepresented its finances, as federal prosecutors allege.