Stephenville , Texas ( CNN ) Before prosecutors wrapped up their case against him , Eddie Ray Routh 's words were in the spotlight Tuesday . A chilling video shown in court showed police placing Routh into a squad car moments after authorities chased him down a Texas highway . Earlier that day in February 2013 , authorities say he gunned down two men who were trying to help him at a firing range : Chris Kyle , subject of the hit film `` American Sniper , '' and Kyle 's friend , Chad Littlefield . In the video , Routh is breathing heavily and teary-eyed . An officer asks if he 's OK. Routh replies : `` I 'm just so nervous about what 's been happening in my life today . I do n't know what 's been happening . I 've been so paranoid schizophrenic all day . I do n't know what to even think of the world right now . I do n't know if I 'm insane or sane . '' At times , Routh appears agitated in the video . He squirms around the back seat . Other times he rests his head with his eyes closed . The small arsenal of weapons Kyle brought to the range that day was shown to the jury , which included five long rifles and several handguns , including one of Kyle 's rifles labeled `` American Sniper . '' According to defense attorneys , Routh , in his psychotic state , thought he was walking into a showdown on the range . Another piece of evidence prosecutors presented Tuesday : a recording of a conversation Routh had while behind bars . From inside the jail where Routh has spent the last two years , he spoke with a writer from the New Yorker Magazine three months after the shootings . Routh can be heard saying he was annoyed at Kyle and Littlefield . `` So we 're shooting pistols here huh ? Hmmm , OK , Again , that 's pretty much saying duel motherf***** . '' Later in the interview , he 's asked what sparked the killings . Routh blames Chad LIttlefield for not shooting with him . `` I was like what the f*** are you even doing here man ? This is n't a spectator sport , it 's a shooting sport , you shoot . And that 's what got me all , you know , wired up . '' He also said : `` I took care of business and then I got in the truck and left . '' Routh 's lawyer admits his client killed Kyle and Littlefield , but contends he was insane at the time . Prosecutors have described Routh as a troubled young man , but they argue he was n't insane ; they say these are the actions of a cold-blooded killer . Taking the stand for the defense , mother Jodi Routh painted a different picture , describing her son 's history of mental health problems . After his time serving in the military , she said , `` he was no longer his happy-go-lucky self . '' His first stay in a VA mental ward was for three days in 2011 , she said . Then he returned again , against his will , and spent weeks in the facility . When he was released , she said , he was on nine different medications , including mood elevators , anti-psychotic medications and sleep aids . Jodi Routh said she had asked Kyle to help , telling him that her son had been diagnosed with post-traumatic stress disorder . She told Kyle that her son had been hospitalized multiple times , but did not tell him that he 'd also threatened to kill himself and his family . `` Do you regret not sharing that level of detail ? '' prosecutor Jane Starnes asked . `` I just wanted to get help for my son , '' the mother replied . Routh 's trial comes just weeks after the release of the film about Kyle , a former Navy SEAL who claimed to be the deadliest sniper in U.S. history , with 160 confirmed kills in Iraq . `` American Sniper , '' directed by Clint Eastwood and starring Bradley Cooper , has grossed the most ever for a war movie . Kyle 's autobiography by the same name spent weeks on best-seller lists . He had already risen to fame through his book when he died , and was involved in charitable work to help former troops suffering from post-traumatic stress disorder . Kyle and Littlefield took Routh to the firing range as a kind of therapy . The range is a small , remote part of the sprawling 11,000-acre Rough Creek Lodge , and the men were isolated . A hunting guide found Kyle , 38 , and Littlefield , 35 , Kyle 's friend , motionless and called 911 . The men were dead when officers arrived . Correction : Earlier versions of this report incorrectly described the military background of Chad Littlefield , who was killed with Chris Kyle . Littlefield was not a veteran . CNN 's Catherine E. Shoichet and Dana Ford contributed to this report .
Chris Kyle is on trial for the 35 shooting deaths of Chris Kyle and Chris Kyle . A video played in court shows him speaking with police after the shooting . In an audio recording , Routh says he was annoyed at Littlefield and Creek Lodge .