February 17, 2015 8:49 AM EST
E ddie Ray Routh admitted to killing American Sniper author Chris Kyle in a rambling, videotaped confession that was played in a Stephenville, Texas, courtroom Monday.
“I’ve got tons of people eating on my soul right now,” Routh, 27, said during the 90-minute confession, the Dallas Morning News reports . “If I did not take down his soul, he was going to take down mine.”
Routh’s defense team has pled insanity on behalf of their client, who offered shifting and at times incoherent explanations of his motives. “I imagine they’re headhunters,” Routh said, “trying to hunt everybody down.” Routh also likened talking to Kyle to “talking to the wolf.”
The former Marine expressed remorse for killing Kyle and his friend, Chad Littlefield, at a Texas gun range in 2013. “I’m just sorry for what I’ve done,” he said in the videotaped interview.
Prosecutors were expected to rest their case on Tuesday.
See the U.S. Military's Last Days of Combat in Afghanistan A U.S. soldier from the 3rd Cavalry Regiment waits for a CH-47 Chinook helicopter after an advising mission at the Afghan National Army headquarters for the 203rd Corps in the Paktia province of Afghanistan on Dec. 21, 2014. Lucas Jackson—Reuters U.S. soldiers from 3rd Cavalry Regiment flag a car to stop to be screened for explosives near forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 14, 2014. Lucas Jackson—Reuters A crew member climbs into a U.S. Blackhawk helicopter before it takes off following a mission to take Brigadier General Christopher Bentley to inspect an Afghan National police installation in the Nangarhar province of Afghanistan on Dec. 16, 2014. Lucas Jackson—Reuters A U.S. soldier from the 3rd Cavalry Regiment is watched as he fires a squad automatic weapon during a training mission near forward operating base Gamberi, in the Laghman province of Afghanistan on Dec. 15, 2014. Lucas Jackson—Reuters U.S. soldiers in Dragon Company of the 3rd Cavalry Regiment watch rounds explode downrange during a mortar exercise near forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 26, 2014. Lucas Jackson—Reuters A U.S. soldier from the 3rd Cavalry Regiment uses the optic on his rifle to observe Afghans in the distance, near forward operating base Gamberi, in the Laghman province of Afghanistan, Dec. 15, 2014. Lucas Jackson—Reuters U.S. soldiers from the 3rd Cavalry Regiment interact with men selected to be biometrically screened near forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 14, 2014. Lucas Jackson—Reuters Humvees for the Afghan National Army are lined up waiting for repair parts at the Afghan National Army headquarters for the 203rd Corps in the Paktia province of Afghanistan on Dec. 21, 2014. Lucas Jackson—Reuters Brigadier General Christopher Bentley (2nd R) and U.S. soldiers from the 3rd Cavalry Regiment take part in a Christmas Eve celebration on forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 24, 2014. Lucas Jackson—Reuters A U.S. soldier from the 3rd Cavalry Regiment relaxes in his quarters after taking part in a mortar exercise on forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 24, 2014. Lucas Jackson—Reuters U.S. soldiers play volleyball at forward operating base Fenty in the Nangarhar province of Afghanistan on Dec. 21, 2014. Lucas Jackson—Reuters U.S. soldiers from the 3rd Cavalry Regiment wait in line to get food during a Christmas day lunch at forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 25, 2014. Lucas Jackson—Reuters U.S. soldiers from the 3rd Cavalry Regiment greet their Afghan police counterparts during an advising mission near Jalalabad in the Nangarhar province of Afghanistan on Dec. 20, 2014. Lucas Jackson—Reuters U.S. soldiers from the 3rd Cavalry Regiment fire a 120mm mortar during an exercise on forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 24, 2014. Lucas Jackson—Reuters U.S. soldiers from the 3rd Cavalry Regiment listen to a translation of an advising meeting at an Afghan National Army base near forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 13, 2014. Lucas Jackson—Reuters A U.S. soldier from Grim Company of the 3rd Cavalry Regiment sits in an MRAP vehicle as he prepares for an early morning mission at Forward Operating Base Fenty in the Nangarhar province of Afghanistan on Dec. 19, 2014. Lucas Jackson—Reuters A mortar flies out of a tube during a mortar exercise for U.S. soldiers in Dragon Company of the 3rd Cavalry Regiment near forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 26, 2014. Lucas Jackson—Reuters Lieutenant Charles McDonald prepares a platoon of U.S. soldiers from Grim Company of the 3rd Cavalry Regiment before an early morning mission at Forward Operating Base Fenty in the Nangarhar province of Afghanistan on Dec. 19, 2014. Lucas Jackson—Reuters U.S. soldiers from the 3rd Cavalry Regiment watch "Die Hard" projected onto an outdoor wall as part of Christmas Day celebrations on forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 25, 2014. Lucas Jackson—Reuters U.S. soldiers from the 3rd Cavalry Regiment take part in an artillery exercise on forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 24, 2014. Lucas Jackson—Reuters U.S. soldiers from Grim Company of the 3rd Cavalry Regiment walk down the street near an Afghan police checkpoint during a mission near Forward Operating Base Fenty in the Nangarhar province of Afghanistan on Dec. 19, 2014. Lucas Jackson—Reuters A U.S. soldier from the 3rd Cavalry Regiment walks through an Afghan police station near Jalalabad in the Nangarhar province of Afghanistan on Dec. 20, 2014. Lucas Jackson—Reuters U.S. soldiers from the 3rd Cavalry Regiment prepare for a mission at Forward Operating Base Fenty in the Nangarhar province of Afghanistan on Dec. 20, 2014. Lucas Jackson—Reuters U.S. soldiers from the 3rd Cavalry Regiment load into a CH-47 Chinook helicopter for an advising mission to an Afghan National Army base at forward operating base Fenty in the Nangarhar province of Afghanistan on Dec. 21, 2014. Lucas Jackson—Reuters A U.S. soldier from D Troop of the 3rd Cavalry Regiment carries a backpack to a shipping container during preparations for leaving Afghanistan at forward operating base Gamberi in the Laghman province of Afghanistan on Dec. 28, 2014. Lucas Jackson—Reuters More Must-Reads from TIME