NEOSHO -- Terry Smith, 36, pled guilty Friday in Newton county district court to second degree murder in relation to the death of his brother-in-law, Steven Todd Gunn. Gunn died in December 2010 when smith was allegedly angry over comments Gunn made about his sister. Investigators say the argument then turned physical and smith pulled out a pistol. After a struggle between the two men, the firearm went off, striking Gunn under the chin and killing him. Smith has been sentenced to 20 years in prison.