Aashuutosh Srivastava and Vipul Dushing both claim to represent Siya Goyal in the Ketan Agarwal murder case Siya Goyal's brother Sahil denied Srivastava's claim, saying Vipul Dushing is her lawyer Srivastava issued a Rs 10 crore defamation notice to Sahil and asked for an unconditional written apology