Nayeemuddin (45), wanted in several cases including murder of an IPS officer in 1993, was killed in an alleged encounter with police at Shadnagar in Mahabubnagar district on August 8.
The police subsequently arrested several of his associates, and also carried out searches at several premises and seized weapons, explosives, gold ornaments and a large number of documents related to land transactions.
"We may approach Income Tax Department, DRI and Enforcement Directorate to check if any money-laundering was involved. We have seized some documents pertaining to land deals," said Y Nagi Reddy, head of the SIT.