TODAY | February 04, 2013
>> texas, search for the motive of a u.s. navy s.e.a.l. another iraq war veteran is charged in that case. lester holt has the latest on the investigation. lester, good morning.
>> willie, good morning. i get to meet and spend time with chris kyle last year for the release of his autobiography. he was the most lethal sniper in u.s. history . he and a friend were gunned down at a shooting range in glenrose, texas . a sad twist of fate for a man who became a hero on the battlefield. america's deadliest military sniper who, over four it tours in iraq, made over 160 confirmed kills, a number chris kyle told me a year ago was not the one he focused on.
>> every person i killed, i have a clear conscience of. they were actively trying to harm americans, military or civilians.
>> reporter: he and his friend, chad littlefield, were shot to death. the alleged killer, eddie ray ralph , former marine, arrived at the range with the victims. after killing them with a semi automatic handgun at close range, he drove to his sister's house and confess ed to the murders before returning home.
>> he was apprehended without any scuffle or fight. and then early this morning, he was arraigned and brought to our jail here where he is now.
>> the sheriff says his understanding is that ralph may suffer from mental problems related to his military service , but offer nod specifics or possible motive.
>> i don't think anybody knows why. they all went out there together.
>> reporter: much of kyle 's time in iraq was spent providing sniper cover for troops. insurgents nicknamed him the devil of ramadi.
>> it gave me pride, knowing i was doing my job enough to get into the minds of the terrorists and make them fearful of me.
>> reporter: back here in the states he started a company in his native texas and raised his public profile with projects like the nbc reality show "stars earn stripes" which paired celebrities with soldiers to carry out military-style missions.
>> tap, rack, bang.
>> reporter: kyle said he was raised to be patriotic, but also had a strong faith in god. that faith especially saw him through his last combat tour, when he was shot twice, one bullet stopped by his body armor . the other, deflected off his goggles.
>> i had a guardian angel out there and i'm sure he hates me, because i would come home and i would break my toe going up the stairs. but every time i went overseas, he kept me safe.
>> reporter: chris kyle leaves behind a wife and two children. according to officials, eddie ray ralph has been arraigned on two counts of murder.
>> and our thoughts are certainly with his wife and those two kids. lester holt , thank you so much.