Multiple web search results report that Julio César Jasso planned the attack for two months. The claim regarding the picture in the hotel room is also mentioned across multiple search results, indicating corroboration from independent reports.

This claim synthesizes information from multiple sources. Web search results corroborate the gunman's identity, the location (Teotihuacán), the victim (Canadian tourist), the nature of the attack (shooting from a pyramid), the timeframe (plotted for two months), and the detail about studying a picture in his hotel room. While the 'Nazi-sympathizing' aspect is mentioned in the search results, the core narrative elements are corroborated across multiple search hits.

Multiple web search results specifically cite that Julio César Jasso sent text messages in February inquiring about a hotel stay between April 8 and 20, and referencing the 'Holy City' as reported by Mexican outlets.

Two distinct web search results confirm that Jasso inquired about a single room at Hotel Villa Meztli, and that this hotel is located approximately three miles from Teotihuacán, with the inquiry occurring around February 17th.

Two separate web search results confirm that Jasso booked the room under the name 'Julio Cesar Ramirez' and provided proof of a bank transfer to the hotel management.

Two web search results corroborate that Jasso stayed in a 4x4 room and that this room contained a picture overlooking the Pyramid of the Moon, which was the structure he scaled before the attack.