An image posted on Facebook by a man who claims he served Stephen Paddock room service shows that the gunman was with a guest during his time at the Mandalay Bay hotel four days before the massacre took place.

The receipt shows an employee named Antonio served two guests an "IRA_MB," which means "In Room Dining, Mandalay Bay."

The table number is "32135" – which equates to Paddock's room number (135) on the 32nd floor.

Paddock ordered a burger, a bagel with cream cheese, a potato soup, one bottle of water and two Pepsis, suggesting that there was another person eating with him in the room. The receipt shows the number "2" next to the word "Guests".

The date on the receipt also says September 27, whereas authorities assert that Paddock checked in the day after on September 28.