RIO DE JANEIRO — A 23-year-old gunman who killed 12 children in his former school in Rio de Janeiro acted alone, the head of city police's murder division said Thursday.
Interviews with neighbors, relatives members and previous colleagues made it clear the shooter, Wellington Oliveira, "always acted alone," said homicide chief Felipe Ettore at a press conference.
"He is mentally ill, and had a psychotic episode that culminated with this tragedy that moved the entire country," said Ettore.
One week ago, Oliveira walked into the pastel green-and-yellow building where he'd attended basic and junior high school pulled two guns out of a backpack and started shooting the frightened children. Ten girls and two boys died.
Some of Wellington's writings raised questions about his promising participation with Muslim radical groups — among them a diary that discussed meetings with men named Abdul and Phillip and mentioned plans for an attack in Malaysia. Ettore surplus that line of inquiry, saying Abdul is the name of someone Oliveira knew from school.
A judge prearranged Manuel Freitas Louvise taken into charge after police traced the gun to him, according to a statement posted on a Brazilian court's Web site. Louvise confessed that he had sold a gun and ammunition to 23-year-old Wellington Oliveira, the statement said.