Adelaide drug mule Cassie Sainsbury, who is serving a six-year jail term for smuggling almost six kilos of cocaine out of Colombia, could have her sentence reduced as a judge considers previously undisclosed evidence.

The 22-year-old originally had been facing up to 30 years in jail after being caught with 5.8kgs of cocaine hidden inside 18 headphone boxes as she tried to leave Bogota’s airport in April.

She was sentenced in November after a judge rubber-stamped a plea deal, but media reports say a judge will consider undisclosed evidence which could reduce Sainsbury’s jail term in what will be her final legal opportunity.

Sainsbury’s mother, Lisa Evans, is travelling to Colombia to support her daughter as she prepares to appear in court in coming weeks, The Adelaide Advertiser reports.

In an interview with the Nine Network’s 60 Minutes program in September, Sainsbury told of how she landed in trouble in Colombia after thinking she had accepted a job as a legitimate courier transporting documents for $10,000 plus flights, but plans changed at the last minute.

She said she was sent to Colombia where a “mastermind” known only as Angelo threatened via WhatsApp to kill her mum, sister and fiance if she did not transport his drugs.