AP News53%

Gunman shoots several tourists at historic pyramids in Mexico, killing a Canadian 13%

By FABIOLA SÁNCHEZ8% MEGAN JANETSKY0%

4/20/2026, 7:51:34 PM

BS Summary: This article contains 17 faulty reasoning types, including Appeal to Emotion, Appeal to Authority, and Anecdotal, with Negativity Bias as the most egregious example at 27.7% saturation with 171 hits. Analysis detected 820 faulty-reasoning hits from 617 analyzed words, generating a BS Score of 29.5% and a BS Rank of 13% (19,145 of 21,887 articles). This article is better (less manipulative) than 87.50% of the article peer group.

MEXICO CITY (AP)  An armed man standing atop one of the historic Teotihuacán pyramids opened fire on tourists Monday, killing one Canadian and leaving at least 13 people injured at the archaeological site north of Mexico's capital, authorities said. 
(Produced by Elaine Carroll) 
The shooter was identified as 27-year-old Julio Cesar Jasso of Mexico, a state official told the AP on condition of anonymity because he is not authorized to speak about the case. 
Jasso later died from a self-inflicted gunshot wound, authorities said, and security officials found a gun, a knife and ammunition. 
Jasso was the sole assailant in the attack, the State of Mexico government confirmed on Monday night. 
The local government said seven people were wounded by gunshots. 
How the other people were injured was not disclosed, but a number of people fell when shooting started, some while climbing on the pyramids. 
Those taken to hospitals for treatment were six Americans, three Colombians, one Russian, two Brazilians and one Canadian, the local government said. 
The youngest person who was injured was 6; the oldest was 61, Mexican authorities said. 
Video and photos published by local media showed a man, later identified as Jasso, standing with a gun on top of a pyramid while people ducked for cover. 
A number of gunshots rang out in the videos. 
"Some people, because they were scared ... threw themselves face down on the ground, and the rest of us started to go down," the guide said, recounting how the shooter, upon seeing the tourists descending the pyramid's steps, began firing. 
Another group of visitors lay motionless on the pyramid's platform to avoid being targeted by the shooter, who authorities have not yet identified. 
Brenda Lee, of Vancouver, British Columbia, said she was waiting to buy a souvenir when she and others in her group thought they heard firecrackers. 
"Before we knew it, someone said, 'No, that's gunfire, run,' and we saw people coming off the top," she told CTV News, one of Canada's national television broadcasters. 
"And then a fellow jumped," she said. 
"It was someone trying to get away, and he dropped to the next level, but he fell on his back, and it was ... it just was awful." 
The scene quickly turned chaotic as people tried to escape, Lee said. 
"There were thousands of people there and there were a lot of gunshots that just kept coming," Lee said. 
In past years, staff at the archaeological site carried out security scans before people entered the area but have since stopped, one local guide noted. 
Mexican President Claudia Sheinbaum wrote on social media that the shooting would be investigated and that she was in touch with the Canadian Embassy. 
"What happened today in Teotihuacán deeply pains us. 
I express my most sincere solidarity with the affected individuals and their families," she wrote. 
Anita Anand, Canada's foreign affairs minister, said on X that as a "result of a horrific act of gun violence, a Canadian was killed and another wounded in Teotihuacán" and that her "thoughts are with their family and loved ones." 
Later in the evening U.S. 
Ambassador to Mexico Ronald Johnson also expressed "deep concern" and sadness over the deaths and numerous injuries, and said on a post on X that the U.S. is "ready to provide support as needed while Mexican authorities continue their investigation." 
The National Institute of Anthropology and History said in a statement that the Teotihuacán archaeological site will remain closed until further notice. 
___ 
Follow AP's coverage of Latin America and the Caribbean at https://apnews.com/hub/latin-america 
AP journalist Jim Morris contributed to this story from Vancouver, British Columbia. 
Article reasoning-pattern comparisonThis article: 3.2%Fabiola Sánchez: 1.4%AP News: 2.0%Confirmation Bias3.2%This article: 0.0%Fabiola Sánchez: 0.1%AP News: 0.8%Anchoring Bias0.0%This article: 10.4%Fabiola Sánchez: 4.0%AP News: 2.7%Availability Heuristic10.4%This article: 3.6%Fabiola Sánchez: 0.7%AP News: 0.7%Representativeness Heuristic3.6%This article: 0.0%Fabiola Sánchez: 0.6%AP News: 0.4%Hindsight Bias0.0%This article: 0.0%Fabiola Sánchez: 0.2%AP News: 1.6%Overconfidence Bias0.0%This article: 1.9%Fabiola Sánchez: 2.3%AP News: 8.0%Framing Effect1.9%This article: 0.0%Fabiola Sánchez: 0.4%AP News: 0.4%Loss Aversion0.0%This article: 4.1%Fabiola Sánchez: 0.3%AP News: 0.5%Status Quo Bias4.1%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.1%Sunk Cost Effect0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 2.2%Optimism Bias0.0%This article: 0.0%Fabiola Sánchez: 2.2%AP News: 2.1%Pessimism Bias0.0%This article: 27.7%Fabiola Sánchez: 4.9%AP News: 9.6%Negativity Bias27.7%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 1.7%Self-Serving Bias0.0%This article: 3.7%Fabiola Sánchez: 0.6%AP News: 0.8%Fundamental Attribution Error3.7%This article: 4.5%Fabiola Sánchez: 0.3%AP News: 0.2%Actor-Observer Bias4.5%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 1.1%In-Group Bias0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.6%Out-Group Homogeneity Bias0.0%This article: 0.0%Fabiola Sánchez: 1.2%AP News: 1.4%Halo Effect0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.1%Horn Effect0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.0%Dunning-Kruger Effect0.0%This article: 1.1%Fabiola Sánchez: 2.0%AP News: 1.3%Recency Bias1.1%This article: 0.0%Fabiola Sánchez: 0.3%AP News: 0.3%Primacy Effect0.0%This article: 0.0%Fabiola Sánchez: 0.2%AP News: 0.1%Blind-Spot Bias0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.8%Ad Hominem0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.1%Straw Man0.0%This article: 15.2%Fabiola Sánchez: 4.3%AP News: 3.7%Appeal to Authority15.2%This article: 0.0%Fabiola Sánchez: 0.2%AP News: 1.2%False Dilemma0.0%This article: 0.0%Fabiola Sánchez: 0.2%AP News: 0.8%Slippery Slope0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.1%Circular Reasoning0.0%This article: 0.0%Fabiola Sánchez: 1.9%AP News: 2.5%Hasty Generalization0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.2%Red Herring0.0%This article: 0.0%Fabiola Sánchez: 0.4%AP News: 0.3%Bandwagon0.0%This article: 21.2%Fabiola Sánchez: 3.5%AP News: 4.7%Appeal to Emotion21.2%This article: 0.0%Fabiola Sánchez: 0.7%AP News: 0.6%Begging the Question0.0%This article: 4.1%Fabiola Sánchez: 1.5%AP News: 2.6%Post Hoc (False Cause)4.1%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.1%Tu Quoque0.0%This article: 0.0%Fabiola Sánchez: 0.2%AP News: 0.4%Burden of Proof0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.1%Appeal to Nature0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.2%Composition/Division0.0%This article: 12.2%Fabiola Sánchez: 1.3%AP News: 1.2%Anecdotal12.2%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.1%No True Scotsman0.0%This article: 9.1%Fabiola Sánchez: 1.1%AP News: 1.5%Ambiguity (Equivocation)9.1%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.0%Gambler’s Fallacy0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.1%Middle Ground0.0%This article: 0.0%Fabiola Sánchez: 0.7%AP News: 0.0%Personal Incredulity0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.1%Special Pleading0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.1%Genetic Fallacy0.0%This article: 5.0%Fabiola Sánchez: 1.6%AP News: 2.0%Unattributed Quote5.0%This article: 0.0%Fabiola Sánchez: 0.8%AP News: 1.2%Quote-first Misdirection0.0%This article: 4.1%Fabiola Sánchez: 0.5%AP News: 3.1%Biased Writer Voice4.1%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.6%Indoctrination0.0%This article: 0.0%Fabiola Sánchez: 0.5%AP News: 0.8%Politically Left Leaning Bias0.0%This article: 0.0%Fabiola Sánchez: 0.0%AP News: 0.2%Politically Right Leaning Bias0.0%This article: 1.8%Fabiola Sánchez: 0.3%AP News: 0.2%Attempt to Sell a Product or S…1.8%

617 words analyzed.

Speakers

8speakers49%attributed speech316writer words
Voice mapSelect a segment to jump to its words
Writer's voice • 12 words • 0.0% coverageWriter's voice • 40 words • 0.0% coverageElaine Carroll • 4 words • 0.0% coverageWriter's voice • 31 words • 100.0% coverageWriter's voice • 20 words • 0.0% coverageState of Mexico government • 17 words • 0.0% coverageWriter's voice • 10 words • 0.0% coverageWriter's voice • 24 words • 0.0% coverageWriter's voice • 22 words • 0.0% coverageWriter's voice • 15 words • 0.0% coverageWriter's voice • 28 words • 0.0% coverageWriter's voice • 9 words • 0.0% coverageWriter's voice • 40 words • 0.0% coverageWriter's voice • 23 words • 0.0% coverageBrenda Lee • 25 words • 0.0% coverageBrenda Lee • 28 words • 0.0% coverageBrenda Lee • 7 words • 0.0% coverageBrenda Lee • 28 words • 0.0% coverageBrenda Lee • 12 words • 0.0% coverageBrenda Lee • 19 words • 0.0% coverageWriter's voice • 25 words • 100.0% coverageClaudia Sheinbaum • 24 words • 0.0% coverageClaudia Sheinbaum • 8 words • 0.0% coverageClaudia Sheinbaum • 15 words • 0.0% coverageAnita Anand • 40 words • 0.0% coverageWriter's voice • 5 words • 0.0% coverageRonald Johnson • 40 words • 0.0% coverageNational Institute of Anthropology and History • 22 words • 0.0% coverageWriter's voice • 1 words • 0.0% coverageWriter's voice • 11 words • 100.0% coverageJim Morris • 12 words • 0.0% coverage
Selected voice

Anita Anand

100%flagged-word coverage
40 attributed words13% of attributed speech79% writer coverage
0%5.0%10.0%Unattributed Quote-9.8 ptsWriter: 9.8%Anita Anand: 0.0%0.0%Biased Writer Voice-7.9 ptsWriter: 7.9%Anita Anand: 0.0%0.0%Attempt to Sell a Product -3.5 ptsWriter: 3.5%Anita Anand: 0.0%0.0%

Attribution is sentence-level. Pattern percentages are calculated only from words assigned to that voice.

Loading…
Loading…
Loading…
Loading…
Loading…
Loading…

Analysis

Hover over highlighted words in the article to view the associated bias or fallacy analysis.