This is evidence that does not forget. It is not confused by the excitement of the moment. It is not absent because human witnesses are. It is factual evidence. Physical evidence cannot be wrong; it cannot perjure itself; it cannot be wholly absent. Only its interpretation can err.
Oath definition, a solemn appeal to a deity, or to some revered person or thing, to witness one's determination to speak the truth, to keep a promise, etc.: to testify upon oath. See more. Dictionary.com
Definition of curse. 1  1 : a prayer or invocation for harm or injury to come upon one : imprecation People believe that there is a curse on the house. 2  2 : a profane or obscene oath or word In an antechamber, his lieutenants suddenly heard the shattering of glass and angry curses.