Canadian tourist killed after gunman opened fire from top of famous Mexican pyramid 25%

By Emma Richter49%

4/20/2026, 8:57:46 PM

BS Summary: This article contains 17 faulty reasoning types, including Appeal to Authority, Availability Heuristic, and Anecdotal, with Negativity Bias as the most egregious example at 32.3% saturation with 127 hits. Analysis detected 803 faulty-reasoning hits from 393 analyzed words, generating a BS Score of 37% and a BS Rank of 25% (16,597 of 21,886 articles). This article is better (less manipulative) than 75.80% of the article peer group.

A Canadian woman was killed after a man opened fire from a famous pyramid in Mexico on Monday, according to authorities. 
The unidentified victim was fatally shot by an unknown man in the Teotihuacán archaeological zone, just about an hour outside of Mexico City, the Mexican government said. 
The shooter took his own life after allegedly killing the tourist. 
At least six people were injured - four by firearm and two by falling, the State of Mexico said. 
They are receiving medical treatment. 
Among the people wounded is one Canadian, a person from Russia, and two Colombian nationals, the Secretary of Security for the State of Mexico, Cristóbal Castañeda, said, CTV News reported. 
Chilling footage circulating on social media showed the gunman firing a gun from halfway up the Pyramid of the Moon while terrified tourists took cover behind the stairs below. 
Following the horrific incident, Mexican President Claudia Sheinbaum said: 'What happened today in Teotihuacan hurts us deeply. 
I express my sincerest solidarity to the people affected and their families.' 
Sheinbaum said that federal and state security forces were being sent out to the site to investigate, and that her administration is in contact with the Canadian government. 
An unidentified man opened fire while on a famous pyramid at the Teotihuacán archaeological zone on Monday in Mexico 
At least six people were injured - four by firearm and two by falling, the State of Mexico said 
The Teotihuacán pyramids are a popular tourist attraction that people from all over the world flock to so they can take in the archeological sites. 
Tim Chung, an American tourist who was visiting Mexico from Seattle, told NBC News he was there with a tour group when shots rang out. 
'All of a sudden I see a guy fall off one of the viewing platforms and then I heard a shot and another person fall off and then I knew something bad was happening and heard screams,' Chung told the outlet. 
Police officers are seen at the Teotihuacan archaeological zone following the deadly shooting 
He described the incident as 'unbelievably sad,' and that everyone in the group, including him, were thankfully unharmed. 
Teotihuacán, a pre-Hispanic city, was one of the most significant cultural centers in Mesoamerica. 
It welcomes 1.8 million tourists every year. 
Article reasoning-pattern comparisonThis article: 0.0%Emma Richter: 1.7%Daily Mail: 3.7%Confirmation Bias0.0%This article: 0.0%Emma Richter: 0.1%Daily Mail: 1.0%Anchoring Bias0.0%This article: 21.4%Emma Richter: 3.1%Daily Mail: 3.5%Availability Heuristic21.4%This article: 10.4%Emma Richter: 0.7%Daily Mail: 0.9%Representativeness Heuristic10.4%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.8%Hindsight Bias0.0%This article: 0.0%Emma Richter: 1.4%Daily Mail: 1.8%Overconfidence Bias0.0%This article: 10.7%Emma Richter: 5.9%Daily Mail: 9.1%Framing Effect10.7%This article: 0.0%Emma Richter: 0.2%Daily Mail: 0.3%Loss Aversion0.0%This article: 0.0%Emma Richter: 0.5%Daily Mail: 0.4%Status Quo Bias0.0%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.1%Sunk Cost Effect0.0%This article: 7.1%Emma Richter: 2.5%Daily Mail: 2.3%Optimism Bias7.1%This article: 2.8%Emma Richter: 1.0%Daily Mail: 1.2%Pessimism Bias2.8%This article: 32.3%Emma Richter: 14.9%Daily Mail: 12.8%Negativity Bias32.3%This article: 4.6%Emma Richter: 2.0%Daily Mail: 2.0%Self-Serving Bias4.6%This article: 0.0%Emma Richter: 1.0%Daily Mail: 1.2%Fundamental Attribution Error0.0%This article: 0.0%Emma Richter: 0.1%Daily Mail: 0.2%Actor-Observer Bias0.0%This article: 7.6%Emma Richter: 1.6%Daily Mail: 1.2%In-Group Bias7.6%This article: 0.0%Emma Richter: 0.7%Daily Mail: 0.9%Out-Group Homogeneity Bias0.0%This article: 3.6%Emma Richter: 2.0%Daily Mail: 4.6%Halo Effect3.6%This article: 0.0%Emma Richter: 0.9%Daily Mail: 0.5%Horn Effect0.0%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.0%Dunning-Kruger Effect0.0%This article: 4.8%Emma Richter: 2.1%Daily Mail: 1.6%Recency Bias4.8%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.5%Primacy Effect0.0%This article: 0.0%Emma Richter: 0.1%Daily Mail: 0.0%Blind-Spot Bias0.0%This article: 0.0%Emma Richter: 1.8%Daily Mail: 1.7%Ad Hominem0.0%This article: 0.0%Emma Richter: 0.5%Daily Mail: 0.2%Straw Man0.0%This article: 27.7%Emma Richter: 3.2%Daily Mail: 4.0%Appeal to Authority27.7%This article: 0.0%Emma Richter: 1.3%Daily Mail: 1.1%False Dilemma0.0%This article: 0.0%Emma Richter: 0.2%Daily Mail: 0.8%Slippery Slope0.0%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.1%Circular Reasoning0.0%This article: 6.4%Emma Richter: 1.7%Daily Mail: 4.3%Hasty Generalization6.4%This article: 0.0%Emma Richter: 1.5%Daily Mail: 0.6%Red Herring0.0%This article: 0.0%Emma Richter: 0.2%Daily Mail: 0.8%Bandwagon0.0%This article: 19.3%Emma Richter: 10.2%Daily Mail: 7.6%Appeal to Emotion19.3%This article: 0.0%Emma Richter: 0.2%Daily Mail: 0.6%Begging the Question0.0%This article: 0.0%Emma Richter: 2.1%Daily Mail: 2.7%Post Hoc (False Cause)0.0%This article: 0.0%Emma Richter: 0.3%Daily Mail: 0.2%Tu Quoque0.0%This article: 0.0%Emma Richter: 0.2%Daily Mail: 0.6%Burden of Proof0.0%This article: 0.0%Emma Richter: 0.2%Daily Mail: 0.1%Appeal to Nature0.0%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.1%Composition/Division0.0%This article: 21.1%Emma Richter: 1.7%Daily Mail: 3.1%Anecdotal21.1%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.1%No True Scotsman0.0%This article: 2.8%Emma Richter: 1.9%Daily Mail: 1.5%Ambiguity (Equivocation)2.8%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.0%Gambler’s Fallacy0.0%This article: 0.0%Emma Richter: 0.1%Daily Mail: 0.0%Middle Ground0.0%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.1%Personal Incredulity0.0%This article: 0.0%Emma Richter: 0.1%Daily Mail: 0.1%Special Pleading0.0%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.2%Genetic Fallacy0.0%This article: 3.1%Emma Richter: 1.9%Daily Mail: 3.8%Unattributed Quote3.1%This article: 0.0%Emma Richter: 1.8%Daily Mail: 1.7%Quote-first Misdirection0.0%This article: 18.6%Emma Richter: 9.5%Daily Mail: 9.2%Biased Writer Voice18.6%This article: 0.0%Emma Richter: 1.7%Daily Mail: 0.8%Indoctrination0.0%This article: 0.0%Emma Richter: 0.9%Daily Mail: 0.3%Politically Left Leaning Bias0.0%This article: 0.0%Emma Richter: 0.0%Daily Mail: 0.6%Politically Right Leaning Bias0.0%This article: 0.0%Emma Richter: 0.1%Daily Mail: 1.0%Attempt to Sell a Product or S…0.0%

393 words analyzed.

Speakers

5speakers57%attributed speech169writer words
Voice mapSelect a segment to jump to its words
Writer's voice • 13 words • 0.0% coverageWriter's voice • 21 words • 0.0% coverageMexican government • 27 words • 0.0% coverageWriter's voice • 11 words • 0.0% coverageState of Mexico • 19 words • 0.0% coverageWriter's voice • 5 words • 100.0% coverageCristóbal Castañeda • 30 words • 0.0% coverageWriter's voice • 29 words • 100.0% coverageClaudia Sheinbaum • 17 words • 0.0% coverageClaudia Sheinbaum • 12 words • 0.0% coverageClaudia Sheinbaum • 28 words • 0.0% coverageWriter's voice • 19 words • 100.0% coverageState of Mexico • 19 words • 0.0% coverageWriter's voice • 25 words • 0.0% coverageWriter's voice • 25 words • 100.0% coverageTim Chung • 41 words • 0.0% coverageTim Chung • 13 words • 0.0% coverageTim Chung • 18 words • 0.0% coverageWriter's voice • 14 words • 0.0% coverageWriter's voice • 7 words • 100.0% coverage
Selected voice

Cristóbal Castañeda

100%flagged-word coverage
30 attributed words13% of attributed speech88% writer coverage
0%22.5%45.0%Biased Writer Voice-43.2 ptsWriter: 43.2%Cristóbal Castañeda: 0.0%0.0%Unattributed Quote-7.1 ptsWriter: 7.1%Cristóbal Castañeda: 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.