A photo taken from Hernandez's home surveillance system released Thursday, July 25, 2013.
ATTLEBORO, Massachusetts (CBS/AP) -- Newly released surveillance photos show former New England Patriot Aaron Hernandez holding what authorities say appears to be a gun, shortly after his friend was shot to death.
PICTURES: NFL tight-end Aaron Hernandez
PICTURES: Notable athletes involved in murder-related cases
The photos taken from Hernandez's home surveillance system are contained in more than 100 pages of court records released Thursday.
Hernandez, 23, has pleaded not guilty to murder in the death of 27-year-old Odin Lloyd, whose body was found June 17 in an industrial park near Hernandez's home in North Attleborough, Mass. He is being held without bail.
READ: Timeline of Aaron Hernandez murder investigation
An affidavit says the pictures show Hernandez in his basement holding a gun not long after Lloyd, a Boston semi-pro football player, was killed. The surveillance was cut off within minutes.
Other photos show what authorities say is Hernandez in his living room before Lloyd's killing, also holding what they believe is a gun.
Police say Lloyd was killed with a .45 caliber gun, but it has not been recovered. When Hernandez was charged last month, prosecutors said he disposed of the gun and then destroyed his home surveillance system.
Prosecutors say Hernandez orchestrated Lloyd's killing because he was upset at him for talking to people Hernandez had problems with at a nightclub a few days earlier.
They say Hernandez and two associates, Ernest Wallace and Carlos Ortiz, drove with Lloyd to the North Attleborough industrial park. Authorities have not said who fired the shots, but documents filed in Florida paint the former Patriot as the triggerman. According to the records, Ortiz told police that Wallace said Hernandez fired the shots.
Hernandez was kicked off the team within hours of his arrest.
Wallace and Ortiz also are facing charges. Wallace pleaded not guilty to a charge of being an accessory to murder after the fact. Ortiz has pleaded not guilty to a gun charge.
Bristol police also have been investigating a possible link between Hernandez and a 2012 double fatal shooting in Boston, and earlier said they had seized an SUV wanted in that investigation from his uncle's home. Court records say it had been rented in Hernandez's name.