The Border Agency ordered squatters to leave their makeshift homes in Hendon last month.
Dozens set up camp on a disused football ground, claiming they had nowhere else to go.
They were offered flights back home to Romania.
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Penny and Ron Jones told ITV News they can't fathom how a 'lovely lad' whose worst crime was bedroom graffiti made a bomb in their kitchen.
The 90-year-old victim watched in horror from her bed as the thief climbed in through her bedroom window.
The remains of Sophie Lionnet, 21, were discovered in a garden at a house in Southfields, south-west London last year.