KUALA LUMPUR: Former Penang chief minister Lim Guan Eng has obtained a witness statement to challenge the credibility of Datuk Zarul Ahmad Mohd Zulkifli.

Zarul who was Consortium Zenith Construction Sdn Bhd (CZCSB) director is one of the star witnesses in the ongoing trial of Penang undersea tunnel project corruption case involving the DAP chairman.