NEW : An ex-school official says Lanza sometimes withdrew `` into his own little world '' Authorities look at smashed computer parts from the gunman 's home , an official says . Lanza visited at least one gun range with his mother , an ATF spokeswoman says . Comment:
NEW : An ex-school official says Lanza sometimes withdrew `` into his own little world '' Authorities look at smashed computer parts from the gunman 's home , an official says . Lanza visited at least one gun range with his mother , an ATF spokeswoman says . Funerals are held for two of the 26 school shooting victims , both of them 6-year-olds .