Las Vegas's killer planned to attack the festival where Obama's daughter was.

Stephen Padddock, the author of the Las Vegas massacre, who took 58 lives and left nearly 500 others injured, allegedly planned to attack two months ago at the Lollapaloza Festival in Chicago.

New details have already been revealed by the owner of the massacre, which two months earlier reserved two hotel rooms with views from the area where the festival was held.

Among the more than 400 thousand people in Lollapaloza this year was former American president's daughter, Barack Obama, Malia, followed the TCh.

The hotel's two reserved rooms were seen by the crowd of participants at the festival, similar to that of the Las Vegas massacre.