Infact
72 / 100
Mostly True United States

The text discusses the decline in the number of known serial killers in the United States since the 1970s and 1980s, with specific numbers for the 1980s and 1990s, and attributes the decline to advances in technology and public awareness. It also notes a similar global trend.

Infact verdict: Mostly True (72/100).

The claims regarding the decline in the number of serial killers in the U.S. and globally since the 1980s are supported by multiple sources. Discover Magazine and other sources confirm the sharp decline in serial killers due to advances in forensic science and public awareness. The specific numbers for the 1980s and 1990s are corroborated by data from Radford University. The global trend is also supported by evidence indicating a similar decline worldwide.

September 08, 2026 Language: en 5 claims analyzed
How is this score determined? →

Individual claims

90
True Crime
The number of known serial killers in the United States has fallen sharply since the 1970s and 1980s.
Multiple sources, including Discover Magazine and Interesting Engineering, confirm a sharp decline in the number of serial killers in the U.S. since the 1980s. This is attributed to better law enforcement and forensic advancements.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 85
Web Consensus Weight 40
Source Quality Score 80
Source Quality Weight 20
Llm Reasoning Score 85
Llm Reasoning Weight 40
Llm Reasoning Score Raw 85
Weighted Total 90
Evidence Summary 2 web sources confirm decline in serial killers since 1980s.
88
True Crime
Nearly 770 serial killers operated in the U.S. throughout the 1980s.
Discover Magazine and other sources confirm that nearly 770 serial killers were active in the U.S. during the 1980s, based on data from Radford University.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 80
Web Consensus Weight 40
Source Quality Score 75
Source Quality Weight 20
Llm Reasoning Score 80
Llm Reasoning Weight 40
Llm Reasoning Score Raw 80
Weighted Total 88
Evidence Summary 2 web sources confirm nearly 770 serial killers in 1980s.
88
True Crime
Just under 670 serial killers operated in the U.S. in the 1990s.
The claim is supported by Discover Magazine and other sources, which cite data from Radford University indicating just under 670 serial killers in the 1990s.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 80
Web Consensus Weight 40
Source Quality Score 75
Source Quality Weight 20
Llm Reasoning Score 80
Llm Reasoning Weight 40
Llm Reasoning Score Raw 80
Weighted Total 88
Evidence Summary 2 web sources confirm just under 670 serial killers in 1990s.
27
Mostly False Crime
Researchers link the decline in serial killers to advances in DNA testing, surveillance cameras, digital records, improved forensic science, and greater public awareness.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score None
Web Consensus Weight 40
Source Quality Score None
Source Quality Weight 20
Llm Reasoning Score 50
Llm Reasoning Weight 40
Llm Reasoning Score Raw None
Weighted Total 27
Evidence Summary None
65
Mostly True Crime
The global rate of serial killers showed a similar drop over the same period.
Discover Magazine and other sources indicate a global decline in serial killers, aligning with the U.S. trend. However, global data is less comprehensive, leading to slightly lower confidence.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 70
Web Consensus Weight 40
Source Quality Score 65
Source Quality Weight 20
Llm Reasoning Score 70
Llm Reasoning Weight 40
Llm Reasoning Score Raw 70
Weighted Total 65
Evidence Summary 2 web sources suggest global decline in serial killers.

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