B Surya Teja, a final year B-Tech student, had made purchases of at least Rs 14,210, online and at malls, police said.
CCTV footage at a shopping mall showed the accused making purchases, police said.
Police tracked him down by tracing IP address of a computer used by him to an Internet cafe.
Teja allegedly could memorise the details of debit cards used at ATMs at a glance, and used these details for online shopping. Further probe is on.
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