As was said previously.
Pulse checks work well when they are checked by someone who knows anatomically where the pulse is and is used to feeling and assessing them day in, day out.
Members of the public are, generally, stupid and cannot be reliably relied upon to find a pulse that is there but can be relied upon to find their own pulse instead of the punter's absent one.
Therefore, removing the requirement for them to feel a pulse, instructing them to start CPR if the punter isn't breathing and telling them to continue CPR until they see 'signs of life' will probably save lives.
However, the girl in this scenario followed those rules but was simply not experienced enough to tell the difference between (presumably) an agonal gasp and a 'sign of life'. And that's hardly a hanging offence.
The question, in my mind is three fold. Should we change the guidelines to include a pulse check for people to :censored::censored::censored::censored:-up? Should we teach them in more detail about signs of life for them to forget and misinterpret? Or should we get everyone who might ever see someone get sick to hang around an ER until they can successfully tell the difference between a liver and a deader?