JUDGMENT : CHANDRA PRAKASH SHRIMALI, J. 1. Ravi Vs State of Punjab ; [ (2025) 3 SCC 584 ] 2. Babu Lal & Another Vs State of Rajasthan; D.B. Criminal Appeal No. 365/2001; Judgment Dated 06.08.2025 "152 . It is well to remember that in cases where the evidence is of a circumstantial nature, the circumstances from which the conclusion of guilt is to be drawn should in the first instance be fully established, and all the facts so established should be consistent only with the hypothesis of the guilt of the accused. Again, the circumstances should be of a conclusive nature and tendency and they should be such as to exclude every hypothesis but the one proposed to be proved. In other words, there must be a chain of evidence so far complete as not to leave any reasonable ground for a conclusion consistent with the innocence of the accused and it must be such as show that within all human probability the act must have been done by the accused". 153. A close analysis of this decision would show that the following conditions must be fulfilled before a case against an accused can be said to be fully established: (1) the circumstances from which the conclusion of guilt is to be drawn should be fully established. It may be noted here that this Court indicated that the circumstances concerned "must or should and not "may be" established. There is not only a grammatical but a legal distinction between "may be proved" and "must be or should be proved" as was held by this Court in Shivaji Sahabrao Bobade v. State of Maharashtra [ (1973) 2 SCC 793 :1973 SCC (Cri) 1033:1973 Crl LJ 1783] where the observations were made: [SCC para 19, p. 807. SCC (Cri) p. 1047] "Certainly, it is a primary principle that the accused must be and not merely may be guilty before a court can convict and the mental distance between 'may be' and 'must be' is long and divides vague conjectures from sure conclusions." (2) the facts so established should be consistent only with the hypothesis of the guilt of the accused, that is to say, they should not be explainable on any other hypothesis except that the accused is guilty. (3) the circumstances should be of a conclusive nature and tendency 4) they should exclude every possible hypothesis except the one to be proved, and (5) there must be a chain of evidence so complete as not to leave any reasonable ground for the conclusion consistent with the innocence of the accused and must show that in all human probability the act must have been done by the accused." "31. The last seen theory comes into play where the time gap between the point of time when the accused and the deceased were seen last alive and when the deceased is found dead is so small that possibility of any person other than the accused being the author of the crime becomes impossible It would be difficult in some cases to positively establish that the deceased was last seen with the accused when there is a long gap and possibility of other persons coming in between exists. In the absence of any other positive evidence to conclude that the accused and the deceased were last seen together, it would be hazardous to come to a conclusion of guilt in hose cases." "16. In the light of the above, it is to be seen whether in the facts and circumstances of this case, whether the courts below were right in invoking the "last seen theory" From the evidence discussed above, deceased- Manoj allegedly left in the truck DL-IGA-5943 on 23.01.2001. The body of deceased-Manoj was recovered on 26.01.2001. The prosecution has contended the accused persons were last seen with the deceased but the accused have not offered any plausible, cogent explanation as to what has happened to Manoj. Be it noted, that only if the prosecution has succeeded in proving the facts by definite evidence that the deceased was last seen alive in the company of the accused, a reasonable inference could be drawn against the accused and then only onus can be shifted on the accused under Section 106 of the Evidence Act". "10. It is settled law that suspicion, however strong it may be, cannot take the place of proof beyond reasonable doubt. An accused cannot be convicted on the ground of suspicion, no matter how strong it isAn accused is presumed to be innocent unless proved guilty beyond a reasonable doubt".