Watch the course of events leading up to the shocking attack of 87-year-old pensioner Thomas O'Halloran.

Lee Byer, 45, was given a hospital order after knifing O'Halloran in the chest and neck.

Watch the course of events leading up to the shocking attack of 87-year-old pensioner Thomas O'Halloran.Lee Byer, 45, was given a hospital order after knifing O'Halloran in the chest and neck.{ai:summary}<p>Lee Byer's violent act on 87-year-old Thomas O'Halloran sends shockwaves through the community. Byer's motives remain shrouded in mystery. #crime</p>

WATCH: CCTV footage shows course of events before 'shocking attack' on 87-year-old

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