Police termed Rao as a self-styled RTI activist who had personal rivalry with a police inspector.
Besides, he was facing two cases including the one filed by a constable against him under the Scheduled Castes and Tribes (Prevention of Atrocities Act), wherein a hearing was scheduled today in a court at Markapur town of Prakasam and another case of cheating.
Police said Rao had been avoiding court proceedings in the atrocity case in which trial was over and a verdict was likely to come within a month.
Preliminary tests suggested that there were no symptoms of any poisonous substance, however, his (Rao's) blood samples have been sent to Forensic Science Laboratory (FSL) in Hyderabad for detailed analysis, Prakasam District Superintendent of Police K Raghuram Reddy told PTI.
"We are probing both the angles if in reality there was any attempt on Rao's life as claimed by him and also if he had self-inflicted the syringes into him," the senior police officer said.
"We are awaiting the FSL report which is likely to be made available in a couple of days and once that report is out we will initiate further action. If there is no poison then police will act against Rao for filing a false complaint," the SP explained.
Srinivas Rao had been invoking provisions of the RTI Act against local revenue and police officials in Markapur for alleged excesses meted out against him.
Rao, who is also into pawn broking, is accused of taking stolen gold ornaments and other valuables for advancing loan and was taken into custody by Kadapa police in this regard and is facing a cheating case.
Following yesterday's incident, Rao, who was hospitalised, had filed a complaint with Markapur police alleging that three unidentified persons injected poisonous substance into him and held the police inspector and the constable responsible for the "attack."
