A North Korean defector's 'death by indifference'

Han Sung-ok, 42, seemed determined to pick through nearly every lettuce on the market stand. She turned each one over and examined it while her six-year-old son clambered on the fence nearby.

The vegetable seller in the southern Seoul suburb looked on, annoyed. This was one picky customer and she didn't even buy a lot of vegetables - only one or two items for as little as she could pay. On this occasion it was a lettuce for 500 won (about $0.40; £0.33).

Uttering only a few words, Han handed over her money and left with her son.

Just a few weeks later, both were dead.