Yeah I understand that defense has resources when the argument about intent/state of mind is already made based on search history but I am interested what happe

Yeah I understand that defense has resources when the argument about intent/state of mind is already made based on search history but I am interested what happens if prosecution searched the computer, haven't find anything and didn't even mention that or flat out refused to seize the computer (because maybe they had reasons to suspect there is nothing to be found). Can the defense say: "there is nothing suspicious found in the searches so that's evidence the accused didn't plan on killing his child" ?