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I assume that you mean that the 27 year old (let us call him TIM) sent nude photos of himself or general pornography to a 16 year old.
If so, then this would be a a crime under Kansas Statutes Annotated § 21-640, entitled Promoting Obscenity to Minors. Worst case scenario is several years in prison and a fine. How long the imprisonment would be depends on the sentencing guidelines which are notoriously complicated in Kansas - see HERE.
If any of this took place outside of Kansas or on a military base or other federal land, TIM may be prosecuted under federal law - let me know if you wish to discuss this.
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