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KANSAS CITY, Kan. - Federal investigators are trying to determine how a Mexican national suspected of five shooting deaths in Kansas and Missouri acquired an assault-style rifle found on him when he was caught.

John Ham, a spokesman for the Bureau of Alcohol, Tobacco, Firearms and Explosives office in Kansas City, said Wednesday that federal law barred Pablo Antonio Serrano-Vitorino from legally owning a gun because he is in the country illegally.

Updated at 2:00 p.m. with quotes from State Reps. Mike Leara (R) and Stacey Newman (D).

Lawmakers proposing gun control legislation could end up in prison under a bill introduced by a Missouri House Republican.

Rep. Mike Leara, of St. Louis County, said Tuesday that he has no illusions that his bill actually will pass and become law.

Gun control is going to be at the top of President Obama’s agenda this year, and Missouri’s US Senators are divided on what to do about it.