Former Atlanta Braves third baseman Chipper Jones apologized Saturday for a tweet he made questioning the credibility of the 2012 Sandy Hook Elementary School Shooting.

Jones tweeted Friday “So the FBI comes out and confirms that Sandy Hook was a hoax! Where’s the outrage? What else are we being lied to about? Waco? JFK? Pfff…”

The 19-year-old baseball veteran called his tweet “irresponsible” after saying he “heard something from someone which I thought to be credible and tweeted w/out researching.” He then said it was responsible of him and he offered an apology to those he affected.

The shooting occurred on Dec. 14, 2012 in Newtown, Connecticut, when 20-year-old Adam Lanza shot and killed 26 people, mostly children, then turned the gun on himself.

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