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Parents and students embrace along School Road near Franklin Regional High School after more than a dozen students were stabbed by a knife wielding suspect at the school on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Sean Stipp) ( APTOPIX High School Stabbings )

A man and woman walk away from Franklin Regional High School after more then a dozen students were stabbed by a knife wielding suspect at the school on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Brian F. Henry) ( High School Stabbings )

Students and guardians walk to their car from the Franklin Regional Middle School after more then a dozen students were stabbed by a knife wielding suspect at Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Brian F. Henry) ( High School Stabbings )

A parent holds hands with a Franklin Regional High School while picking up the student after more than a dozen students were stabbed by a knife wielding suspect at the school on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Sean Stipp) ( High School Stabbings )

Jenna Mickel, right, a sophomore at Franklin Regional High School, right, stands with her father, Richard, as she talks with reporters near the school, where several people were stabbed, Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Gene Puskar) ( High School Stabbings )

A pair of women walk arm-in-arm off the campus of the Franklin Regional School District, where several people were stabbed at Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Keith Srakocic) ( High School Stabbings )

Students leave the campus of the Franklin Regional School District where several people were stabbed at Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Gene Puskar) ( High School Stabbings )

A Salvation Army disaster services vehicle drives past a school bus onto the campus of the Franklin Regional School District where several people were stabbed at Franklin Regional High School, Wednesday, April 9, 2014 in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Keith Srakocic) ( High School Stabbings )

Students leave the campus of the Franklin Regional School District where several people were stabbed at Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Gene Puskar) ( High School Stabbings )

A policeman directs a driver to the area to pick up students on the campus of the Franklin Regional School District where several people were stabbed at Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Keith Srakocic) ( High School Stabbings )

Studentswalk down the street away from the campus of the Franklin Regional School District, where several people were stabbed at Franklin Regional High School, on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Gene Puskar) ( High School Stabbings )

Emergency responders gather in the parking lot of the high school on the campus of the Franklin Regional School District where several people were stabbed at Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Keith Srakocic) ( High School Stabbings )

A woman walks onto the campus of the Franklin Regional School District where several people were stabbed at Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Gene Puskar) ( CORRECTION High School Stabbings )

Emergency vehicles are parked around Franklin Regional High School, where several people were stabbed on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Gene Puskar) ( High School Stabbings )

Emergency responders gather at the high school on the campus of the Franklin Regional School District, where several people were stabbed at Franklin Regional High School, Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Tribune Review, Sean Stipp) ( High School Stabbings )

A police officer blocks the entrance on the campus of the Franklin Regional School District where several people were stabbed at the school on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Tribune Review, Brian F. Henry) ( High School Stabbings )

Students and a guardian walk to their car from Franklin Regional Middle School after more then a dozen students were stabbed by a knife wielding suspect at nearby Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Brian F. Henry) ( High School Stabbings )

An ambulance and emergency vehicles leave Franklin Regional High School where more then a dozen students were stabbed by a knife wielding suspect on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Brian F. Henry) ( High School Stabbings )

A student and guardian walk to their car from Franklin Regional Middle School after more then a dozen students were stabbed by a knife wielding suspect at nearby Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Brian F. Henry) ( High School Stabbings )

Students are escorted as they leave the campus of the Franklin Regional School District after more then a dozen students were stabbed by a knife wielding suspect at nearby Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Gene J. Puskar) ( High School Stabbings )

Students are escorted from the campus of the Franklin Regional School District after more then a dozen students were stabbed by a knife wielding suspect at nearby Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Gene J. Puskar) ( High School Stabbings )

A student leave the campus of the Franklin Regional School District after more then a dozen students were stabbed by a knife wielding suspect at nearby Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Gene J. Puskar) ( High School Stabbings )

Students walk past a row of buses as they leave the campus of the Franklin Regional School District after more then a dozen students were stabbed by a knife wielding suspect at nearby Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Gene J. Puskar) ( High School Stabbings )

A police officer guards the entrance Heritage Elementary School as students are dismissed after more than a dozen students were stabbed by a knife wielding suspect at nearby Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Sean Stipp) ( High School Stabbings )

A parent consoles their child as the leave Franklin Regional High School after more than a dozen students were stabbed by a knife wielding suspect at the school on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Sean Stipp) ( High School Stabbings )