Searches are being performed in public areas close to the scene of the murder at the junction of Main Street and Hardwick Road.
Police officers from the Northants Tactical Support team are combing the grassed surface for evidence following last night’s shocking stabbing.
Officers are also carrying out door-to-door enquiries.
It happened at around 8.30pm and officers have arrested four people who remain in custody.
Detectives have asked anyone with information to call them on 101 or Crinestoppers on 0800 555 111.