The Colaba police to submite charge sheet against Saif

Reports say that The Colaba polic, Mumbai has completed all the necessary processess and prepared a chargesheet against Saif Ali Khan in an assault case. 

The question is: Why have they not filed the chargesheet yet? This incident occured in February 2012. It means they wanted to bury the case. The man who had been assaulted has gone back to South Africa. His name is Iqbal Sharma.