surat a 22yearold man was booked for threatening his sister to kill after murdering her boyfriend in athwa police station of the city on friday out of affair with his sister the accused murdered a youth on wednesday and later threatened his sister to kill police booked jemish bhagat resident of machhiwad in nanpura following complaint of his sister monika the accused arrived at home after murdering monikas boyfriend akshay rajput on wednesday evening and threatened the complainant claiming that the entire issue started due to her relationship before he could do anything to the complainant he had to escape fearing police arrest the accused and his family were against monikas relationship with rajput and the relationship led to disputes between the families rajput was stabbed to death by the accused with help of two other friends following the murder the accused escaped and police are on their search apart from bhagat two other accused involved in the murder are history sheeter police informed monika expressed fear of being attacked to police after that police registered the complaint police have registered the complaint since the accused had threatened the victim to kill her police are investigating the case to find out more details said police