Alabama professor studies mass shootings in 171 countries for more than 40 years

DETROIT – Adam Lankford studied mass shootings in 171 countries for more than 40 years.

From 1966-2012, he looked into mass shootings and found that the United States has the most public mass shooters and more than 240 million more guns than the second highest country, India.

See Lankford's research here.

Learn more about Lankford's study in the story above.