OKLAHOMA CITY (AP) — A teenager who witnessed an Oklahoma police captain fatally shoot his unarmed friend testified Wednesday that the 18-year-old raised his hands and appeared to try to surrender before he was shot.

John Lockett, 17, was on the witness stand for a second day in the trial of Del City police Capt. Randy Harrison, 48, who is charged with first-degree manslaughter in the March 14, 2012, death of Dane Scott Jr. Harrison, a 23-year veteran of the police department in Del City, located southeast of Oklahoma City, has pleaded not guilty and faces a minimum of four years and a maximum of life in prison if convicted.

Harrison had previously arrested Scott on drug violations, and prosecutors say he seemed obsessed with the teen. A police affidavit says Scott posed no threat of death or great bodily harm when he was shot in the back, but the defense says Harrison's use of deadly force was justified because of Scott's actions before the shooting.

Lockett said Scott was running from Harrison when the officer opened fire. "He had his hands up like this," Lockett said, holding his hands up over his head. "He put his hands up like he surrendered."

Prosecutors say Harrison fired four bullets, one of which went through both of Scott's lungs and pierced his aorta.

Harrison had tried to pull over a car Scott was driving when the teen led Harrison on a high-speed chase. Lockett, who was in the car, testified Tuesday that Scott tried to hide marijuana and a gun he had. The car eventually crashed into a tractor-trailer.

After the collision, Scott and Harrison scuffled on the ground before Scott wriggled free, Lockett said. Authorities have said that during that scuffle, Harrison took a handgun from Scott and the teen was not armed when he was shot.

Another witness, Eric Thomason, 48, of Oklahoma City, testified that Harrison appeared to be fighting for his life as he struggled to disarm Scott. But Thomason said the teen did not appear to be a threat to Harrison or another officer nearby when the shooting happened.

"I never felt him as a threat to me," Thomason said.

Thomason, who was with a co-worker in a pickup truck that pulled up to an intersection where the struggle was taking place, said that when the two were wrestling on the ground, he thought Scott was trying to shoot the officer. "I was looking down the barrel of the gun they were fighting over," he said.

But Harrison was able to knock the handgun from Scott's hand before Scott broke free, Thomason said. Scott started running away from the officer and toward the pickup, Thomason said. He said he got out of the truck and tried to grab Scott as he ran by. Scott slipped his grasp and attempted to climb over a fence before he was shot and fell to the ground.

Thomason said he was frightened by the gunfire.

"The gun was being pointed in my direction," Thomason said. "I felt like I was in the line of fire."

After Harrison was charged last year, his attorney said prosecutors' decision was made in part to prevent the kind of racial discord that erupted after high-profile shootings in Florida and Tulsa. Scott was black; Harrison is white.

Scott was shot a few weeks after the death of Trayvon Martin, the black teen who was unarmed when he was shot in Florida by a neighborhood watch volunteer. And Harrison was charged within weeks of the arrests of two white men accused of fatally shooting three black people in Tulsa during a shooting spree that investigators described as racially motivated.

Also on HuffPost:

Loading Slideshow...
  • Nala The Dog's Throat Slit

    An officer in Baltimore City was charged with animal cruelty after allegedly slitting the throat of Nala (pictured with owner), a pet who had escaped from her home. Nala had nipped at a woman's hand earlier in the day, but even that woman was horrified by officers' treatment of the dog. She noted that Nala was not aggressive, but had bitten her only "out of fear." <a href="http://www.huffingtonpost.com/2014/06/19/jeffrey-bolger-cop-slits-dogs-trhoat_n_5512981.html" target="_blank">Click here to read the whole story.</a>

  • The Shooting Of Arzy Kensington

    In April 2012, an officer in Sulphur, Louisiana approached two men on trespassing charges and, while apprehending them, tied one of the men's dog to a nearby fence. A third party witness at the scene said that the dog was rubbing up against the officer, who was petting him, but then "all of a sudden, he just jumped down and shot the dog in the head." The officer later claimed the dog had bitten him, but both the witness and the dog's owner say that's not true. <a href="http://www.huffingtonpost.com/2014/04/29/cop-smiles-after-shooting-dog_n_5235504.html" target="_blank">Click here to read the whole story.</a>

  • Kelly Thomas

    FILE - This July 5, 2011 file still frame from security camera video, released May 7, 2012, by the Orange County District Attorney, shows an altercation between Fullerton police officers and Kelly Thomas at the Fullerton, Calif., bus depot. Thomas died days later. Two officers, Manuel Ramos, and Jay Ciccinelli, are on trial charges related to his death. Closing arguments are scheduled to begin Tuesday, Jan. 7, 2013. (AP Photo/Orange County District Attorney, File)

  • Oscar Grant BART shooting

    Oscar Grant was shot by a Bay Area Rapid Transit (BART) police officer early on New Year's Day 2009 in Oakland, Calif. Cellphone footage shows BART cops struggling with Grant and forcing him to lay facedown on the platform after reports of a fight on the train. Officer Johannes Mehserle was seen shooting Grant in the back once, killing him. He was later convicted of involuntary manslaughter, but acquitted of second degree murder.

  • Rodney King Beating

    In one of the most notorious cases of police brutality, a bystander recorded four Los Angeles Police Department officers beating Rodney King with their batons in 1991 after they pulled him over for driving erratically. When the videotape emerged days later of the attack, the four cops were charged with assault. A jury acquitted them, sparking riots in April 1992 that killed 55 people and led to 12,000 arrests over seven days.

  • Anthony Abbate

    Off-duty Chicago police officer Anthony Abbate was<a href="http://www.huffingtonpost.com/2009/06/23/ex-cop-anthony-abbate-get_n_219651.html" target="_hplink"> sentenced to two years probation</a> and anger management classes after being captured on video beating a female bartender in 2007.

  • William Cozzi

    Chicago police officer William Cozzi was sentenced to 40 months in federal prison after he was caught on camera in 2005 handcuffing a man to a wheelchair and beating him in a hospital. Cozzi claimed the victim -- a man who was seeking treatment for stab wounds -- had attacked him.

  • Christopher Long

    A New York City police officer was <a href="http://www.huffingtonpost.com/2010/07/15/patrick-pogan-biker-shove_n_646517.html " target="_hplink">acquitted of assault and harassment</a> after being videotaped <a href="http://www.huffingtonpost.com/2008/07/28/critical-mass-bicyclist-a_n_115390.html " target="_hplink">knocking over cyclist Christopher Long</a> during a "Critical Mass" bike ride through Times Square in 2008. Patrick Pogan resigned from the police force and was found guilty of filing false documents after video emerged that contradicted his claim that Long swerved into him.

  • Ahmed Amadou Diallo

    Ahmed Amadou Diallo, 22, seen here in an undated photo, was gunned down at his home in the Bronx borough of New York early Thursday morning, Feb. 4, 1999. Four white police officers from the elite Street Crime Unit fired 41 shots at Diallo, a black West African immigrant who had no police record and was unarmed. Diallo was hit 19 times and died instantly. The officers' lawyer says Diallo gestured with his hands, leading the police to think he was reaching for a gun.

  • Abner Loiuma

    Abner Loiuma became a symbol of unchecked police force after the Haitian immigrant was sodomized with a broomstick by cops in a New York City police station in 1997. The officer responsible for the attack, Justin Volpe, was sentenced to 30 years in prison.

  • Ian Tomlinson

    London newspaper vendor Ian Tomlinson died after police officer Simon Harwood hit him with a baton and <a href="http://www.huffingtonpost.com/2009/04/09/british-police-officer-su_n_185251.html " target="_hplink">knocked him to the ground</a> as he walked away from police during a G-20 protest in 2009. Harwood will stand trial in October for manslaughter, <a href="http://www.guardian.co.uk/uk/2011/jun/20/ian-tomlinson-death-officer-trial" target="_hplink">according to The Guardian</a>.

  • Michael Mineo

    Michael Mineo accused an NYPD cop of sodomizing him with a baton after getting busted for smoking marijuana at a Brooklyn subway station in October 2008. A jury cleared the officer accused in the attack as well as two others charged with covering up the alleged assault.

  • Jon Burge

    In this May 24, 2010 file photo, former Chicago Police commander Jon Burge departs the federal building in Chicago. Burge, whose name has become synonymous with police brutality and abuse of power in Chicago, was convicted in 2010 of perjury and obstruction of justice for lying in a civil suit when he said he'd never witnessed or participated in the torture of suspects.

  • Danziger Bridge Shootings

    The trial is underway for four New Orleans police officers accused of killing two people and wounding four others in the shooting on the Danziger Bridge in the aftermath of Hurricane Katrina in 2005. The suspects, pictured left to right, are Robert Faulcon Jr., Robert Gisevius Jr., Kenneth Bowen, and Anthony Villavaso II.

  • David London

    Security cameras in a Manhattan apartment building recorded NYPD officer David London hitting Iraq war veteran Walter Harvin almost 20 times with a baton even after he had handcuffed him. The incident began when Harvin entered the building without a key and refused to identify himself to London. Footage shows Harvin shoved London, but the cop lied to investigators by claiming that he'd been punched before retaliating with his baton. A jury acquitted London of assault and making false statements in 2010.

  • Eleanor Bumpurs

    Eleanor Bumpurs, a 66-year-old African American woman, was killed by NYPD officers who were trying to evict her from her Bronx public housing apartment in 1984 for falling behind on her rent. City housing authority workers called in the cops, because they claimed that Bumpurs -- shown in an undated photo -- was mentally ill and that she menaced them with a knife while refusing to vacate her home. The officer who shot Bumpers twice with a shotgun was acquitted in 1987.

  • Sean Bell

    The 2006 shooting of 23-year-old Sean Bell raised questions in New York City about the NYPD's use of excessive force. On what would have been his wedding day, Bell was shot and killed by police in a hail of 50 bullets outside a strip club in Queens. Officers said they thought the victim and his friends, who were celebrating Bell's bachelor party, were planning on retrieving a gun from their vehicle when they opened fire. After months of protests around the city, Officers Michael Oliver, Gescard Isnora and Marc Cooper were acquitted in 2008.