chennai police on thursday arrested a printing press worker his two sons and two other relatives for killing a 35yearold law student whose younger brother was allegedly in a relationship with the press workers wife the woman is missing since may 18 vijaykumar and his sonv abhishek along with mari and nagaraj were sent to jail for killing nageswara rao in vadapalani on wednesday while vijayakumars younger son a minor who was also involved in the murder was sent to a juvenile homepolice said kowsalya 35 who lived with her husband and sons on rajamudaliar street went missing on may 18 and the family filed a complaint with policerajesh a realtor with three children often visited the family and vijayakumar suspected he was having an affair with kowsalya police saidthe suspicion grew when rajesh was found missing since the day kowsalya disappeared said a police officeron wednesday night vijayakumar his sons and mari and nagaraj went to a birthday party on kumaran colony main road where they saw rajesh and his elder brother nageswara raoabhishek picked up an argument with rajesh demanding to know where his mother was soon they exchanged blows as the others came to help abhishek rao intervened when vijayakumar and his family dropped a stone on his headsome visitors to the party rushed rao to a private hospital where doctors declared him brought deadabhishek and his younger brother too were injured in the clash while the elder sibling was admitted to a private hospital in vadapalani the younger one who suffered a head injury was admitted to the rajiv gandhi government general hospitalrao who worked for a private firm was pursuing a law degree in neighbouring andhra pradeshpolice are still trying to find kowsalya we are attempting to trace her with the help of the photographs given by the family said an officer