Today marks the first day of a four-day inquest into the suspected friendly fire death of 26 year old Sapper Mark Antony Smith from Swanley in Kent.
He is thought to have died in an explosion in Afghanistan after a shell landed short of its target.
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"All it takes is for somebody to see me - and I could just die, just like that. I could want to go to the shop and not come home."
Before the killing, Peters searched the internet for "serial killers", "treatment of child killers in prison" and "premeditated murder".
Arriva Rail North, Greater Anglia and South Western Railway are all affected.