Scotland Yard said they were treating the toddler's death as non-suspicious and that a post-mortem examination was due to take place to establish how the little girl died.
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Marta Ligman may have been alive with just minutes of air left in the suitcase when Kocik was seen on CCTV dragging her from their flat.
The former London Mayor also claimed Tony Blair's decision to ignore security advice had "killed 52 Londoners".
The victim, a woman in her 40s from Hillingdon, west Londion, was conned into handing over the fortune to a man who faked his name.