Emergency services found the student hanging out of a bedroom window at the family home in Haywards Heath, bleeding from the groin.
Both he and his mother were rushed to hospital with life-threatening injuries after she called 999.
He is normally a lovely lad and very bright. But unfortunately, he had started dabbling in drugs.He had come home from university for Christmas. It looks like he took mephedrone and completely flipped out attacking his mum and then himself.