"This discharge is improper and the high court should strike it down," Swamy told reporters here.
"I have read the FIR (in Lavalin case). There was a strong prima facie case laid out. How would this man be discharged?" he asked.
Alleging that CBI, which has "worked" not under court monitoring but under the state government, had been forced to perform "like a parrot" as the apex court had stated.
A CBI court in Thiruvananthapuram had on November 5 dropped Vijayan and five others from the list of accused in the case dating to mid 1990s when he was power minister in the LDF Ministry.
