Aaron Hernandez saw his PCP-taking friends kill Odin Lloyd but did not commit the murder himself, his defense claimed in the closing arguments of his trial on Tuesday. 'Did he make all the right decisions? No,' defense attorney James Sultan said. 'He was a 23-year-old kid who witnessed... a shocking killing committed by somebody he knew. He really didn't know what to do. So he just put one foot in front of the other.' After closing arguments from the defense and the prosecution, the jury began their deliberations on Tuesday afternoon. If convicted, Hernandez faces a maximum penalty of life in prison. The former New England Patriots football player, 25, has pleaded not guilty to murder and firearms charges in the death of Lloyd, a semiprofessional football player who was dating his fiancée's sister. Scroll down for video . On trial: Aaron Hernandez is seen in court on Tuesday as his attorney shows a video of his home before closing arguments. His defense argued that he witnessed the killing of a friend but did not commit it himself . Defiant: Defense attorney James Sultan holds a photo of the murder scene during closing arguments . Prosecutor William McCauley points to Hernandez on Tuesday as he told jurors to simply look at the evidence . Prosecutors say the former tight end and two friends, Ernest Wallace and Carlos Ortiz, picked up Lloyd at his Boston home before dawn on June 17, 2013, and drove him to an industrial park near Hernandez's house in North Attleboro, Massachusetts, where they shot him to death. Surveillance video at Hernandez's home minutes after the shooting showed him holding a black item that appeared to be a gun. A joint found near Lloyd's body had Hernandez's and Lloyd's DNA on it. Murdered: Semi-pro football player, Odin Lloyd, was shot dead near Hernandez's home in June 2013 . Cellphone records shared in court also showed the men communicating with Lloyd that night. Surveillance video along the way showed Hernandez driving the Nissan shortly before Lloyd's sister saw him get into a silver car, a moment captured on a neighbor's security camera. Soon after, a toll booth camera caught the Nissan leaving Boston, while Lloyd's phone pinged several cell towers before stopping in North Attleborough for good. His body was found in an industrial park less than a mile from Hernandez's home later that day. Lloyd had been shot six times. In his closing arguments, Assistant District Attorney William McCauley told jurors  to go through all the evidence. 'If you do that, you'll get to where you need to go, which is to find the defendant guilty for the murder of Odin Lloyd,' McCauley said. But the defense said the prosecution's case failed to prove Hernandez pulled the trigger. Prosecutors have never presented a motive to jurors and Sultan added on Monday that Hernandez and Lloyd were friends who shared 'a passion for marijuana'. 'Obviously they were friends,' Sultan told the jury. 'They were future brothers-in-law.' Wallace and Ortiz have also pleaded not guilty to murder charges and will be tried separately. Both men used the drug PCP, according to attorneys and court documents, and the defense team has sought to link use of the drug with violent, unpredictable behavior in an apparent attempt to shift blame for the murder on the pair. Blame game: Attorneys from the defense team said Carlos Ortiz, left, and Ernest Wallace, right, were responsible for the murder - not Hernandez. DNA and surveillance footage ties all three to the scene . Support: Shayanna Jenkins (left), Hernandez's girlfriend, and his mother Terri listen to the judge on Tuesday . Emotional: An uncle of Odin Lloyd is comforted as he hears details about his nephew's death on Tuesday . Investigators say Lloyd was shot multiple times with a Glock .45-caliber handgun that has not been found. Sultan said that after nine weeks of testimony, prosecutors 'still haven't proved to you who killed Odin Lloyd.' During the trial, which started in late January, the prosecution called 131 witnesses while the defense called three. Sultan also attacked the investigation, saying a shell casing removed from a rental car returned by Hernandez had been contaminated with his client's DNA from a piece of chewing gum stuck to it. 'The investigation done in this case was incomplete, biased and inept. That was not fair to Odin Lloyd, that was not fair to Aaron Hernandez, and it was not fair to you,' he said. 'All that effort and this is all they could come up with. What does that tell you?' Eighteen jurors began the trial in January, but three were dismissed, including one who is accused of misrepresenting her answers during screening in a bid to get onto the jury. Hernandez had a $41 million contract with the Patriots. He was cut after being charged with Lloyd's killing in June 2013. All smiles: The former New England Patriots football player smiles during a conversation with his defense lawyer Charles Rankin on Monday. His lawyers argued the prosecution has not proven he pulled the trigger .
Jurors begun deliberations in Aaron Hernandez's murder trial on Tuesday afternoon after the prosecution and defense made their closing arguments . The former New England Patriots football player is accused of killing semi-pro player Odin Lloyd, who was dating his fiancee's sister, in June 2013 . His defense said on Tuesday that he witnessed his friends, Ernest Wallace and Carlos Ortiz, kill Lloyd but did not commit the shooting himself . His lawyers said the prosecution has not proven he pulled the trigger . Hernandez faces life in prison if convicted of the murder .