In the case of Sushant's death, lawyer Vikas Singh has said in his statement that Siddharth Pithani is a person of dubious character.
He kept regular contact with Sushant's family until Sushant's father lodged an FIR in Patna. During this, he spoke of giving continuous support to the family.
But as soon as the FIR was registered, his behavior changed. He became an assistant to Riya Chakraborty, the main accused in the FIR. Helping the accused in a criminal case proves the relationship between the two. Only by arresting him and questioning will the truth of the case be revealed.