Danvers teen, Philip Chism, was accused of murdering his teacher after her body was found outside the high school.
Colleen Ritzer, 24, was found dead behind the school, officials said.
Ritzer, 24, of Andover, taught math at the school.
Essex District Attorney Jonathan Blodgett released few details about the murder, but said blood was found in a second-floor bathroom at the high school shortly after 11 p.m. Tuesday night.
The school was immediately secured.
Sometime on their last day at the school together Tuesday, prosecutors say, teacher Colleen Ritzer and 14-year-old student Philip Chism crossed paths, and he killed her.
Officials haven't released a cause of death or discussed a motive in the killing. A court filing said Ritzer and Chism knew each other from the high school, but it didn't elaborate.
Investigators said in court documents that the arrest was made based on statements by the suspect, evidence from school surveillance cameras and corroborating evidence in multiple places.
Ritzer was "a very respected and loved teacher," Blodgett said.
She was in her second year teaching at the school, according to our news partners at Wicked Local/Danvers, and she previously taught at the Hale Middle School in Stow.
All public schools in Danvers were closed Wednesday as police investigate the homicide.
Cal Fire - SLO
An Italian restaurant in Pismo Beach was badly damaged in an early morning 2-alarm fire.
A fire in Central California northeast of Bakersfield has ripped across 19,000 acres with zero containment, and more than 100 homes are a total loss.
Scherpa "Sherpa" Fire acreage remains at 7,474 acres with 93% containment as of Saturday morning.
The Santa Barbara Summer Solstice Parade will be taking over the city tomorrow, but festivities begin today.
On June 23, the United Kingdom voted to leave the European Union. The controversial vote had an immediate effect on the world economy.
The iconic Enos House in Santa Maria, which dates back nearly 150 years, is moved to a new location on the Enos Ranchos property to make way for new commercial development.
Campers streamed into Refugio State Beach early Saturday morning.
Oxnard police are investigating the seventh homicide of the year.
The International Olympic Committee is formed, the SAT exam is taken for the first time, Hitler takes in newly conquered Paris, and Tim Burton's "Batman" hits theaters, all on this day.
Karl Walter/Getty Images
Here's a look at some of the celebrities we've lost so far in 2016.
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