Enterrados en el jardín

I just watched an episode of this totally far fetched show. A white woman goes missing....within minutes police were on the case, searching everywhere. Apparently the police found the partner to be "Believable", so, because they found him to be believable, there was then "no need to investigate him." Until a psychic made this amazing prediction that she was suffocated with a plastic bag. NOW CHECK THIS : The coroner examines skeletal remains several years old (like very little tissue, if any at all remaining). But they are magically able to determine the cause of death to be asphyxia. And the police said they were pretty sure it was a plastic bag over the head ??? WTF ??? How can you tell the difference between how someones nose and mouth have been denied oxygen from a corpse several years old ??? OK If a neck bone is broken, it signifies strangulation, but this is just too far beyond belief.