Arnoldo Rios-Soto's family said police officers need to be better trained to deal with people who have mental disabilities.
There were "no indications" the teenage gunman who killed 9 in the German city of Munich had links to ISIS or any other terror group, police said.
A 57-year-old man has been arrested in her abduction.
The bombers targeted protests organized by an ethnic minority group, killing many of them and members of Afghanistan's security forces.
Huseyin Bayri recalled his attempt to save a teenager who died in his arms after being shot by the Munich shooter at a shopping mall.