The provisions of Section 149 of the Evidence Act enable a Court to accept circumstantial evidence in proof of facts in issue and in particular on proof of cause of death in criminal cases. This has become necessary because in criminal matters, the possibility of always proving the offence charged by direct and positive testimony of eye-witnesses is rare. It is therefore permitted under the provisions of the section to infer from facts proved, the other facts necessary to complete the elements of guilt or establish innocence.
– M.L. Garba JCA. Odogwu v. Vivian (2009) – CA/PH/345/05