Police have sent to prosecutors their case against a 19-year-old university student who allegedly attempted to murder two friends with rat poison in 2012.
The student, being held for the murder of an elderly woman in Nagoya in December, was served with a fresh arrest warrant Friday for the alleged poisoning attempt.
According to police, the student, whose name is being withheld because she is a minor, tried to kill the two 19-year-olds by putting thallium sulfate in their drinks at a karaoke bar in Sendai between May and June 2012 when the suspect attended high school there.
Police said the student has admitted to trying to poison the two teenagers, a female and a male, saying she wanted to "observe" what would happen to them after ingesting rat poison.
The student, who attended Nagoya University, was arrested in January on suspicion of murdering a 77-year-old woman by clubbing her with a hatchet in the suspect's apartment last December.