Aman was robbed in an alley outside a busy restaurant. he was assaulted with a baseball bat that was left at the scene. there were bloody footprints leading away from him. he was treated by paramedics and taken to a hospital. two witnesses saw the robbery. the suspect fled the scene, but was apprehended. his bloody shoes were taken for evidence. which task should be done by forensic scientists? secure the crime scene collect the bat and blood samples conduct tests to compare the bloody footprints with the shoes and match the blood conduct the investigation