Singh, a TV producer and actor, was in a relationship with the "Balika Vadhu" star.
"Rahul has been provided help by police. He was given multiple opportunities to get away. Rahul is absconding, his phone is switched off... So if he is absconding, the Investigating Officer is solely responsible for that," the late TV star's father, Shankar Banerjee, said.
Besides, Pratyusha's parents raised several questions over the investigation and reiterated their daughter didn't commit suicide, but was "murdered" by Singh, who is on bail.
"We have been saying since the beginning that this is murder. But police didn't listen to us. They called it a suicide and filed an abetment to suicide case. We haven't got a copy of the charge sheet yet, we kept roaming in court, but police didn't cooperate with us," Shankar said.
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The 24-year-old actress' parents claimed her abortion was done "forcefully". "I know it (abortion) was done forcefully and not with her consent," Shankar said.
When contacted, a senior police officer associated with the probe, refused to make any comment on charges levelled by Banerjee. "I don't want to comment anything. You people (referring to media) know how the investigation has been going since beginning," he said.
Singh has disappeared again after his anticipatory bail plea in a separate case was rejected by a local court. A woman, Heer Patel, has accused him of cheating her and her parents of Rs 25 lakh by promising to make a film on them, a commitment he did not fulfil.