Pararajasingham was one of the ENDLF/EPRLF/TELO/TULF alliance's candidates in Batticaloa District at the 1989 parliamentary election but failed to get elected after coming fifth amongst the alliance candidates. However, he entered Parliament in 1990 following the assassination of Sam Tambimuttu on 7 May 1990. The early 1990s were a difficult period for the civilian population of eastern Sri Lanka, caught in the middle of fighting between the militant Liberation Tigers of Tamil Eelam and the Sri Lankan military. There was rampant human rights abuses by the military and police. Batticaloa District witnessed many massacres including Kokkadichcholai and Mylanthanai. Many people turned to Pararajasingham for help. Pararajasingham would telephone, fax and write to ministers, civil servants, the military and the police to seek assistance for the civilians. When Pararajasingham took up the case of Murugesapillai Koneswary, who had been gang raped and murdered by the police, an enraged police officer "summoned" Pararajasingham, a Member of Parliament.