Danvers, Massachusetts (CNN) -- There is a spot in the halls of Danvers High School that will always remind students and teachers of Colleen Ritzer. The bathroom, where the math teacher was killed on Tuesday.
The school will open its doors to high school students again on Friday, but the bathroom will remain closed, police said. It is still an active crime scene.
How was Ritzer killed? With a box cutter the suspect, 14-year-old Philip Chism, had brought into school, a source close to the investigation says.
What happened to her body afterward? It was stashed in a recycling bin, rolled outside, then dumped about 20 feet into woods behind the northeastern Massachusetts high school's athletic fields, adds another source. It was left there -- not buried, not even covered.
And where did the alleged killer go afterward? After changing his clothes, he went to a Wendy's fast food restaurant and a movie, sources say, before police in a neighboring town saw him walking on a busy road under the pitch-dark sky early Wednesday.
Those are the answers, many of them revealed Thursday, two days after the teacher's killing. Yet the question of why this happened -- why a popular young educator who always wore a smile and went the extra mile was killed allegedly by a teenager who friends, family and co-workers described as reserved and well-behaved -- continues to loom large.
