A grieving family are demanding answers as to how a 19-year-old girl was found dead in a hotel's walk-in freezer after wandering off from a party.

Kenneka Jenkins was pronounced dead at the Crowne Plaza Hotel in Rosemont, Chicago in the early hours of Sunday morning after attending a party on the hotel's ninth floor on Friday night.

Her mother, Tereasa Martin, received a call in the early hours of Saturday morning from friends who said they couldn't find Jenkins after the party.

Ms Martin said she immediately made her way down to the hotel and asked them to check the surveillance footage to see if they could locate her daughter.

Referred to the police, the increasingly concerned mother called 911 before dispatchers told her to wait a few more hours at the chance Jenkins could be out with other friends.

"We were begging for help, and no one was helping," she told the Chicago Tribune.

View photos Kenneka Jenkins was found dead inside a hotel walk-in freezer on Sunday (local time). Source: Supplied More

View photos She was attending a party on the ninth floor of the Crowne Plaza Hotel in Rosemont, Chicago. Source: Google Street View More

After Rosemont police "actively canvassed and searched the immediate area", the teenager's body was discovered in the walk-in freezer just after just after midnight on Sunday morning.

Ms Martin said police informed her that her intoxicated daughter had let herself in the freezer and couldn't get out.

"She was so drunk, that was his exact words, she was so drunk she couldn't hold herself up. She was holding on to the wall," Ms Martin added.

"I believe someone in this hotel killed my child."

View photos The teenager's family insist there is more to the story than they are being told. Source: Supplied More

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