Pushing Someone Off a Cliff, and Getting Caught

HAVE YOU EVER BEEN TEMPTED to push someone off a cliff? (Is there anyone who hasn't been?) Of all the people, and in the long run there must've been many, who pushed someone off a cliff to their death; how many have been "caught"? How many have paid for the crime, and how many have walked? How many have gone utterly without suspicion? In the United States (where else?) a young lady is on trial for allegedly pushing her new husband to his death in one of America's pristine national parks. There were no witnesses. So, why is she on trial? Perhaps because someone found the body, which was identified, which led to the wife, and to the fact that she was not, shall we way, exactly forthcoming about the situation.Her goose is cooked. She'll cop a plea on man one, maybe man two, and do time, thanks to her own, big, mouth. She had mixed emotions about getting married, did it anyway, freaked, changed her mind, saw an opportunity. Motive, opportunity. Case closed. Her story, evidently, is that she did indeed shove her new husband, but that it occured in the course of an argument, and was an accident, since she didn't intned that her shove result in his death. How lame. Its obvious that she killed him, but failed to think through how to do it, how to deal with it. Obviously, if you kill someone by pushing him/her off a cliff, the first thing you should do is run to the authorities, reporting it as an accident. If you don't, it will ge traced to you, and you will have to explain your lack of reportage. You might think that nobody ever gets convicted of murder for pushing somebody off a cliff. really, nobody should. But many do, incredibly enough.