SALEM, Mass. 
       (AP) -- A teenager who raped and killed his high school math 
teacher was sentenced Friday to life in prison with eligibility for 
parole in 40 years.
The 2013 slaying of 
Danvers High School teacher Colleen Ritzer by Philip Chism was "brutal 
and senseless," Salem Superior Court Judge David Lowy said as he 
pronounced the sentence.
"Colleen Ritzer lived a life of quiet heroism," the judge said. "The crashing waves of this tragedy will never wane."
Chism
 was 14 when he followed Ritzer, who was 24, into a school bathroom, 
strangled her, stabbed her at least 16 times and raped her. His lawyers 
acknowledged he killed her but argued he was mentally ill, a contention 
rejected by the jury.
Chism, now 17, will 
serve life in prison with the possibility of parole in 25 years on a 
murder charge, but he received 40-year concurrent sentences on rape and 
robbery charges. The net result will leave him eligible to be paroled in
 40 years, when he would be in his 50s.
Ritzer's parents said Chism should never have a chance to leave prison on parole.
Her
 mother, Peggie Ritzer, called the sentence unacceptable. She blamed the
 state Supreme Judicial Court, which ruled in December 2013 that 
juveniles could not be sentenced to life in prison without the 
possibility of parole.
Prosecutors had asked 
that Chism stay in prison for at least 50 years. Defense attorney Susan 
Oker asked for a sentence that would make Chism eligible for parole no 
later than age 40. She cited scientific studies that said a juvenile 
brain is not fully developed.
During the 
earlier sentencing hearing, Ritzer's parents, siblings, colleagues and 
lifelong friends on Friday described a young woman who loved her job, 
her students and her life and who never had a negative word to say. Many
 of them wore pink, her favorite color.
Peggie Ritzer said her daughter's death had left her "so very broken."
"Now
 I isolate myself from people I love because pretending to be happy is 
so difficult," she said. "He is pure evil, and evil can never be 
rehabilitated."
Tom Ritzer said he felt as though he had failed his daughter.
"I
 didn't protect Colleen," he said. "A dad's job is to fix things. I 
would do anything I could if I could fix this for Colleen."
Chism's
 mother, Diane Chism, cried quietly as he was sentenced. Earlier Friday,
 she released a statement expressing her condolences to Ritzer's family.
"Words
 can't express the amount of pain and sorrow these past 2 1/2 years have
 been," she said. "However, there is no one who has suffered more than 
the Ritzer family. My utmost esteem, prayers and humble respect is with 
them today as they continue their journey to heal."
At
 trial, the defense said Chism wasn't criminally responsible for his 
actions. A psychiatrist who testified for the defense said Chism, who 
had just moved to Massachusetts from Clarksville, Tennessee, was hearing
 voices and was in the throes of a psychotic episode when he killed 
Ritzer.
Chism was convicted of raping Ritzer 
inside the bathroom but was acquitted of a second rape, committed with a
 tree branch in woods near the school where he put her body. He also was
 convicted of armed robbery for stealing Ritzer's credit cards and 
underwear.
 
 
 
 
 
 
 
 
 
 
 
 
