Reference for Sanhedrin 74:9
אלמא אף על גב דפסילי בדיני ממונות אמרינן להו בדיני נפשות הכא נמי אף על גב דפסילי בדיני ממונות אמרינן להו בדיני נפשות:
BASED ON CONJECTURE. Thus, only in capital charges do we disallow conjecture, but permit it in civil suits.<span class="x" onmousemove="('comment',' This follows from the fact that the Mishnah states this only in connection with the former. ');"><sup>16</sup></span> Who [is the authority for this]? — R. Aha. For it has been taught: R. Aha said: If among camels there is a lustful one, and a camel is found killed by its side, it is certain that this one killed it.<span class="x" onmousemove="('comment',' V. B.B. 93a. Hence in monetary cases circumstantial evidence is acceptable. The Mishnah thus follows the view of a single authority. ');"><sup>17</sup></span>