Photographs released by the Arapahoe County District Attorney showed the seats where victims of Holmes' rampage were when he opened fire.
Using three different weaopns, Holmes fired on the 400 theatre-goers after disorienting them with smoke grenades when he stood up at the front row.
Drink cups and bags of popcorn were struck by the gunfire, which riddled the theatre with bullets and fragments.
Holmes fired 76 rounds from a shotgun, a semi-automatic rifle, and a pistol in a blaze of fire that killed 12.
The floor of the theatre and the pavement outside were smeared with the blood of the victims as survivors fled and tracked the blood with their shoes.
In the photograph, a spent shotgun wadding lies next to popcorn and a napkin on which blood has been spilled.
Fans were at the Aurora cinema to watch the latest Batman flick "The Dark Knight Rises," where shooter Holmes dressed in character as a psychotic killer.
Police flagged the trajectory of the bullets that flew into the crowd, killing 12 and wounding dozens. Three persons in an adjacent cinema were also wounded when bullets pierced the wall separating it from the scene of the shooting.
Blood pooled on the floor of the theatre, where bullets pierced the seats where hapless fans fell.
At the entrance of the theatre, survivors fled through the lobby and streamed into the parking lot. They tipped over a wastebasket and left a trail of blood.
The semi-automatic rifle used by Holmes lies next to a pink flip-flop and a spoor of blood left behind by one of the victims.
The blood of Holmes' victims extended into the street. When police arrived, within 90 seconds of receiving a distress 911 call, they found screaming people fleeing the gunfire. Some of the wounded were drenched in their own blood, and the blood of others.
A pile of black clothing lies next to another pool of blood on the sidewalk surrounding the cinema.
Police found Holmes car parked outside of the theatre. In it, they found a concealed handgun as well as ammunition.
Holmes carried several magazines for his semi-automatic rifle, as well as shells for his pump-action shotgun. He was wearing tactical-type clothing during the rampage. When police first observed him, they thought that he was just another police officer. He also wore a gas mask, having first detonated smoke grenades to disorient the viewers of the movie who may have thought he was pulling a movie-related stunt.
Holmes' semi-automatic rifle is seen near an exit door along with blood splashed by his victims.
Holmes used a military-grade gas mask, as well as grenades intended for use by law enforcement. He had planned the attack for months, having cease to attend classes for his graduate degree in neuroscience.
Some of the rounds Holmes fired pierced a side wall of the cinema, striking and wounding three persons watching a film in an adjacent cinema.
The glass from the shattered passenger side window of Holmes' vehicle lies next to a shotgun round he left behind.
Holmes concealed an additional firearm in a compartment in the passenger-side door.
A cellphone left behind by one of the victims lies on the sidewalk covered with blood.
The people watching the film had no time to defend themselves. No one in the audience is known to have been armed and able to respond to Holmes' violence.
Once he was in police custody, Holmes admitted that he had rigged his apartment with volatile explosives, including gunpowder and gasoline. On the floor of the apartment, he had strewn gunpowder in an attempt to accelerate an explosion. He used two different methods in an attempt to actuate an explosion. Before leaving, he made a recording of 40 minutes of silence followed by cacophonous music. Holmes expected that the racket would cause a neighbor to call the police with a complaint. Holmes hoped that police would enter the apartment and detonate the deadly improvised explosives. A neighbor did knock on the door that night to complain about the noise. However, when she received no response she left the apartment behind but did not call the police.
Holmes filled black plastic spheres with explosives, and also stored gasoline in plastic bottles. Outside his apartment, he left behind a remote-control toy and a remote that he had rigged to detonate the explosives.
On top of his television, he left a creepy testimony of one of his obsessions: Batman.
On the walls of his apartment, Holmes displayed movie posters, including one depicting Samuel Jackson and John Travolta in 'Pulp Fiction' wielding guns.