CHARGESHEET SUBMITTED Son strangled Sandhya, dissolved body in acid S Ahmed Ali TNN March 14, 2014 Mumbai: A year-long police investigation has concluded that Raghuveer strangled his mother Sandhya Singh at their home and used a strong acid to dissolve her body in the bathtub.     He then dumped the skeletal remains in a marsh near their flat in NRI Complex, Seawoods, Navi Mumbai, reveals the chargesheet submitted in the Vashi court on Friday.     The police tested the acid’s potency by experimenting it on a chicken. The police have relied on “circumstantial evidence” to prove Raghuveer’s culpability. Currently, Raghuveer is in judicial custody. In the 1,400-page chargesheet, the police said that on December 13, 2012, Sandhya’s friend had given her a lift to the bank. Sandhya decided to visit another friend who stayed nearby after she found the bank shut. Raghuveer probably strangled Sandhya after she returned home around 1.30pm. Cops plan to continue their investigation to ascertain whether or not Raghuveer had any accomplices. “We have not given a clean chit to all those who were quizzed. This includes Raghuveer’s father Jai Prakash and his friend,” an officer said. The evidence gathered includes Raghuveer’s cellphone location showing that he and two others were near the spot where the remains were found for a considerable time two days before the remnants were discovered. The police have recovered Sandhya’s watch that Raghuveer allegedly sold. “Sandhya was wearing the watch when her friend dropped her outside the bank. As Raguveer sold the watch, it shows Sandhya returned home,” an officer said.The police have written to the government asking them to appoint a special prosecutor.