Riddle: One morning the maid saw her owner lay through the floor. She called the police. Police asked three main suspects. Ana, Marry, And the maid.
Ana: i was hanging out with my friends.
Marry: i was sleeping and i woke up when the Maid shouted.
Maid: i was gonna woke her for the breakfast and i saw her lay through the floor.
who is the killer?

please i need the answer this is not a joke if you didn't know the answer don't answer it. Thank you in advance :)