The PTI founder answered police questions for 15 minutes after DSP Asif assured justice but refused the tests requested by the Punjab Forensic Science Agency, as reported by The Nation.
He stated that he was under investigation by multiple institutions and would cooperate with the police after completing his current inquiries.
During the May 9 protests, alleged PTI supporters attacked military installations, including the General Headquarters, and vandalized monuments.
Following the violence, authorities launched a significant crackdown on the PTI, with over 100 PTI workers being tried in military courts.
Civil and military authorities have accused Khan of orchestrating the May 9 conspiracy before his arrest, a claim he and his party have strongly denied.
Khan acknowledged calling for a peaceful protest outside the GHQ in case of his arrest but denied ordering any vandalism.
Khan has been imprisoned in the high-security Adiala Jail in Rawalpindi for nearly a year, convicted in three cases: the Toshakhana corruption case, the cipher case, and the un-Islamic marriage case, in which his wife, Bushra Bibi, is also jailed.
Despite securing bail or having his convictions overturned, Khan has not been released.
He was arrested on August 5 last year after his conviction in the first Toshakhana corruption case filed by the Election Commission of Pakistan.
