(NEWSER) – Adam Lanza apparently planned the Sandy Hook massacre by himself and left no evidence of why he killed 27 people at a Connecticut elementary school last year, according to a report released today. "Why did the shooter murder twenty-seven people, including twenty children?" wrote Danbury State's Attorney Stephen Sedensky in the report, which closed an 11-month police investigation. "Unfortunately, that question may never be answered conclusively." The report does say Lanza planned all his actions, including his suicide, and even wore ear buds during the assault, the Hartford Courant reports. Also from the report:
- A blow-by-blow of Lanza's carnage. The 20-year-old fired 154 shots, mostly in the classroom of substitute teacher Lauren Rousseau, where Lanza murdered her and 14 of her 15 students.
- He killed six more in the classroom of Victoria Soto, where student Jesse Lewis told kids to run when Lanza's gun jammed. Six safely got past Lanza, but Lewis was killed.