Nissan Motor Co. has strengthened a task force of senior officials ahead of an expected onslaught of criticism from former Chairman Carlos Ghosn following his dramatic escape from house arrest in Japan, three sources familiar with the matter said.

Ghosn, who fled Japan to his home in Lebanon late last month, has said he will hold a news conference Wednesday to give his side of the story following his arrest in late 2018 for alleged financial misconduct, which he denies.

He has argued through his lawyers that his arrest was part of a boardroom coup d'etat and that top Nissan executives signed off and participated in some of the financial transactions that are now central to the charges against him. Nissan has denied this, and is bracing for more such allegations.