There are now 117 cases against him. Among other charges, the SP candidate from Sultanpur faces serious charges like murder, attempt to kill, land grabbing, extortion and rioting.
Police officials say his 'gang' has more than 140 members.
Politically, however, his re-entry into the SP fold is being seen through the prism of minority vote bank and party's desperate attempt to hold on to the fast loosing grip on Muslims.
"The party hopes to gain from Ateeq Ahmad both in terms of muscle power and Muslim votes," a senior SP leader said.
(With IANS inputs)