According to police, the accused, who was accompanying the bank manager in his vehicle, "instantly" decided to murder his "friend" after finding out about the money in the car.
Sharma was arrested by the CID team from Gandhinagar on Friday, a day after a case was registered against him and Shah in Bhuj on Thursday. Shah was also arrested on Friday.
A case was lodged against three brothers who owned the building that collapsed on Monday, killing 4 people, after the Junagadh Municipal Corporation filed a complaint saying that the owners had been asked to demolish the building.