New Delhi, Jan. 13 -- Investigations into the murder of 44-year-old Rachna Yadav, an Aam Aadmi Party (AAP) worker and residents' welfare association (RWA) member in Shalimar Bagh, have revealed that the two assailants used two motorcycles to execute and flee after the crime, senior police officers said on Monday. The attackers arrived in Shalimar Bagh on separate motorcycles on Saturday morning. While one motorcycle, on which the shooter arrived, is untraced, the second was used for escape and later found abandoned on Helipad Road in Rohini. Police confirmed the two-motorcycle theory after scanning CCTV footage from the crime scene . However, the identities of the killers remain unknown even 72 hours after Yadav, a key witness in her husban...