What is ISRO chara(spy)case

The major allegation in the ISRO spy case is that confidential information regarding Liqiud Propulsion technology has been leaked to other countries. Main  accused were Mariam Rasheeda and Fawzia Hussain (Maldwian citizen),Nambi Narayanan and Sasikumaran(ISRO scientists),Raman Sreevastva(IPS Officer, who later became DGP).(Also read-I grew up hating India-Imran Khan)In the political storm that ensued then Chief Minister Sri.K Karunakaran had to resign from the post.Later it was found that ISRO spy case was a fake and fabricated one.However, some believe that ISRO spy case was a real one and accused persons, who were politically powerful, had subverted the all investigation by using their influence. Some say if Salmankhan can escape from punishment, persons accused in spy case,who are more powerful, can easily hoodwinke the  system.