November 25, 2013 -- Updated 1212 GMT (2012 HKT) NEW: Family of slain teacher Victoria Soto speaks out against the release of the report Connecticut officials to release a summary of the almost yearlong shooting investigation Family members of the victims have been told about the report The December 14 shooting left 26 dead, including 20 children (CNN) -- A report on the investigation into the Sandy Hook Elementary School shooting will be released Monday, Connecticut state officials announced. The report will provide a summary of the almost yearlong investigation of the December 14, 2012, shooting that left 26 people dead, including 20 children. The summary of the second-deadliest shooting in U.S. history is expected to be about 50 pages long, said Mark Dupuis, a spokesman for Danbury State's Attorney Stephen Sedensky, whose office conducted the investigation. Dupuis declined to provide details about when, where, and how the families were given the details of the report. Connecticut panel: Release 911 calls in Newtown massacre "We are sensitive to the needs of the families, and those needs are being addressed," Dupuis said. The family of Victoria Soto, a teacher who shielded her students before being shot to death, said the release of the report is "yet another blow that our family has been dealt." A statement from the family said, "While others search for the answer as to why this happened, we search for the how. How can we live without Vicki? How do we celebrate Christmas without Vicki? How do we go on every day missing a piece of our family? Those are the questions we seek the answers for. There is nothing in the report that will answer those for us. The report, which will be available on the office's website Monday afternoon, is separate from a much longer evidence file that Connecticut State Police will release at an unspecified date. The shooter, identified as 20-year-old Adam Lanza, killed his mother before opening fire at the school. He then killed himself, officials said. Haunted by the Newtown massacre, police officer faces firing over PTSD June 8, 2013 -- Updated 1118 GMT (1918 HKT) Congress may have defeated tighter gun laws, but states have been passing bills of their own in the wake of Newtown Details continue to emerge about what precisely happened at Sandy Hook Elementary School. Here is a timeline of events that compiles the latest reporting. May 25, 2013 -- Updated 0512 GMT (1312 HKT) The public school district will receive $1.3 million to help the community recover from the , U.S. Department of Education Secretary Arne Duncan announced. March 29, 2013 -- Updated 1353 GMT (2153 HKT) Police released new documents related to the shootings last year at Sandy Hook Elementary School in Connecticut, but a motive for the attack by the troubled young man remained elusive. January 15, 2013 -- Updated 1626 GMT (0026 HKT) His parents remember Dylan Hockley as such a happy child. February 19, 2013 -- Updated 2349 GMT (0749 HKT) Investigators have found evidence that Sandy Hook Elementary School gunman Adam Lanza "was obsessed" with other mass murderers. December 19, 2012 -- Updated 1517 GMT (2317 HKT) Amid the chaos that first-responder Ray Corbo witnessed on Friday, there is one image that he will never forget. December 20, 2012 -- Updated 1502 GMT (2302 HKT) In many ways, Josh Stepakoff's childhood came to an abrupt halt at 10:49 a.m. on August 10, 1999. December 18, 2012 -- Updated 1530 GMT (2330 HKT) Placing yourself in the path of flying bullets to protect innocents. It's a job description fitting for a soldier or police officer, but not for a school teacher.