There are fears Cardiff City's new striker Emiliano Sala could have been on board.
Malaciah Thomas, 20, died in July last year having suffered multiple stab wounds.
Heavy traffic and new housing hampers the growth and development of a border town, a study warns.
Emiliano Sala was born in Santa Fe, Argentina - but it is in France that the 28-year old has forged his reputation.
Just three days after signing for Cardiff City, Emiliano Sala was on a light aircraft which disappeared on Monday night.
South Wales Argus
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