Levelling major allegations on the Aam Aadmi Party (AAP) chief and former Delhi Chief Minister Arvind Kejriwal, ahead of the assembly elections, Bharatiya Janata Party (BJP) leader Gaurav Bhatia on Wednesday said that the contractors and liquor businessmen, who are friends of Kejriwal, have invested around Rs 100 crores of black money in the construction of Sheesh Mahal.