The man accused of stalking and stabbing to death 18-year-old high school student Saaya Suzuki confessed that he was waiting inside her Mitaka, Tokyo, home to kill her, investigative sources said Thursday.

"In the afternoon on the day it happened, I entered Suzuki's house through the window and waited there for her," Charles Thomas Ikenaga, 21, was quoted as saying by Metropolitan Police Department investigators. They also alleged that Ikenaga spent several hours in the closet of her room Tuesday.

In an embarrassing twist that could lead to further criticism of their failure to save the girl's life, it was revealed that officers at the Mitaka Police Station, where Suzuki reported being stalked earlier Tuesday, phoned her around 4:30 p.m. to confirm she was at home. She was believed slain around 5 p.m.