Police release documents detailing Sandy Hook school nightmare Connecticut state police release thousands of pages of documents and media tied to their investigation of the shooting massacre at Sandy Hook Elementary School last year. A PICTURE of a birthday card from the father of the Sandy Hook Elementary School shooter inviting his son to go shooting is among dozens of photos and thousands of documents released by police about the bloody day. Adam, Happy Birthday. Send me an email when you want to go hiking or shooting. Love, Dad," reads the undated card to shooter Adam Lanza, 20, from his father Peter, the New York Post reports. The card shows a cheery hamster on a birthday cake and the words "Let the celebrating begin!" printed on the inside. The evidence also includes a photo of a young, camouflage-clad boy holding a handgun to his mouth, draped in ammo best with what looks like a grenade in his lap seated on the floor before a rack filled with rifles. A canvas pistol case with shootings targets from a storage box in the basement of the house where Adam Lanza lived. Picture: AP/Connecticut State Police Source: AP The identify of the boy in the photo was not confirmed by police. Disturbed ... An undated photo released by the Western Connecticut State University of Adam Lanza. All the photos released show the violence-obsessed killer's deadly arsenal of guns, knives, a samurai sword and shot-up paper targets, along with a book titled Train Your Brain To Get Happy and a blank CD labelled GOOD ANIME MIX. Another foreboding item found in the upscale home Lanza shared with his mother Nancy - whom he shot point blank in the head while sleeping before driving to the school - was a childish drawing of a student forcing a teacher out of a small building with the words, "You are now not a teacher no more!" Violent ... Miscellaneous video games from a desk in the family room in the basement of the house where Adam Lanza lived. Police posted about 7000 pages of documents on the Connecticut state police website - the final, complete report of the police investigation into the December 14, 2012 shooting at Sandy Hook Elementary School. The documents don't answer why Lanza went on a shooting rampage but reveal new details about the shooting, and how brave teachers protected their students and the school's temporary janitor confronted the gunman. The Newtown community mourns the lives lost when a gunman opened fire in Sandy Hook Elementary School, one year ago today. Teachers heard the janitor, Rick Thorn, try to get Lanza to leave the school. One teacher, hiding in a closet in the math lab, heard Thorn yell, "Put the gun down!" An aide said she heard gunfire and Thorn quickly told her to close her door. Grand home ... An aerial view of the home where Adam Lanza lived with his mother. Thorn then called 911 - and gunshots could be heard booming in the background as he told police of the horror unfolding inside the small, suburban school. Lanza shot his way into the school about 9:30am armed with a military-style Bushmaster semiautomatic assault rifle with six, 30-round magazines, three of them emptied. Bells ring out, as the Newtown community mourns the loss of 20 children and 6 adults, killed in a shooting rampage at Sandy Hook Elementary School one year ago. He was also carrying a 9mm Sig Sauer pistol and a Glock 10mm handgun, which he used to blow his brains out about five minutes after the carnage began. He also had a Saiga 12-gauge shotgun with two magazines containing 70 rounds in his car. He gunned down 20-first graders - all aged 6 and 7 - and six educators, including the school's principal. For more see the New York Post President Obama and first lady Michelle Obama observe a moment of silence at the White House on the anniversary of the Sandy Hook Elementary School shootings. Stephen and Rebecca Kowalski lost their son, Chase, in the mass shooting at Sandy Hook Elementary School in Connecticut. They discuss how they've coped with the tragedy and the fund they created that honors their son's love of sports.