Picture of cracks in the room on the ground floor before the crash submitted by Sunil Shitap’s lawyer in court. Pic/Rajesh Gupta

Investigators may soon arrest the architect and the contractor who helped hospital owner and Shiv Sena leader Sunil Shitap to carry out illegal alterations on the ground floor of Ghatkopar's Siddhi Sai Apartment, which resulted in its crash and killed 17, police sources said. The police suspect that the people who helped Shitap knew the consequences of the alterations.