article_snippet.sent: But now The Mail on Sunday can reveal the damning evidence that proves the authorities have known for 14 months that hydrogen cyanide gas capable of killing Zane had leaked into the family's home as it was engulfed by floodwater.
article_snippet.sent: But damning new evidence proves the authorities knew for 14 months that hydrogen cyanide gas capable of killing Zane had leaked into the family's home (pictured) as it was engulfed by floodwater .
article_snippet.sent: our have said all along that they found hydrogen cyanide at Kye and Nicole's house and here is the proof.'
article_snippet.sent: A commanding officer's statement to police says: 'As we were about to leave the premises, one of the gas detectors went into an amber alarm indicating hydrogen cyanide had been detected at levels of ten parts per million.
article_snippet.sent: The firefighters double-checked The firefighters equipment and re-entered the house on two more occasions to confirm that hydrogen cyanide was in the property at 'concentrated levels', according to hydrogen cyanide incident log.
article_snippet.sent: Neighbour Mr Marsden said: 'Neighbour Mr Marsden said to Neighbour Mr Marsden there was hydrogen cyanide.
article_snippet.sent: this newspaper asked Surrey Police why the force had not disclosed that this newspaper knew hydrogen cyanide had been detected in the family's home hours after Zane had died.
highlights_snippet.sent: Evidence shows authorities knew hydrogen cyanide leaked into family home .
  
highlights_snippet.sent: Police and other agencies were fully informed of hydrogen cyanide at the property at the time, but never confirmed hydrogen cyanide publicly despite repeated questioning by this newspaper.