HILLSBOROUGH, NC -- A teenager accu...

HILLSBOROUGH, NC -- A teenager accused of killing his father and opening fire outside his former high gymnasium was obsessed with school massacres and sent e-mail to the principal of Columbine High educate in Colorado warning of his attack, authorities said Thursday.

"Dear Principal," the e-mail read. "In a hardly any hours you will probably hear about a academy shooting in North Carolina. I am responsible for it. I remember Columbine. It is time the world remembered it. I am sorry. Goodbye"

Alvaro Castillo sent the message Wednesday morning, shortly before pair students were wounded by the gunfire in the Orange High train parking lot in Hillsborough, said Orange shire Sheriff Lindy Pendergrass. One observer was grazed by a bullet and another was injured by means of flying glass.

Castillo, 19 was quickly arrested, and police set two pipe bombs and brace rifles in the van he was driving and four additional pipe bomb at his domicile authorities said.

Castillo mentioned the Columbine massacre as he arrived Thursday for an initial court appearance.

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