But she believes no action was taken.
The 50-year-old from Cheshire said: 'I didn't hear anything on it again.
'Now I see Salman, who clearly hung around with them, has become a suicide bomber. So clearly they didn't look into what I told them properly.'
She said she recognised Abedi's name as soon as it became public on Tuesday and is convinced he was part of the group that intimidated her and her husband outside court.
She added: 'They are all friends and are ending up terrorists and rapists.
'At the time it made me think another one could go on to commit a terrorist act and Salman clearly has.'
Last year the Daily Mail told how the private schoolgirl aged 16, a gifted musician who had little experience with boys, was introduced to the group including Ahmed plus Muhyadeen Osman and Mowled Yussuf by a mutual friend in 2013.
Along with other youths who have not been identified, they lured her to a run-down hotel in Rusholme, where they had spent the previous night celebrating Eid.
They forced her inside an unlocked room and each subjected her to a degrading attack.
Last year the trio, then all aged 20, were jailed for a total of 31 years for rape.
Cruelly, the victim's parents faced a gauntlet of intimidation during the two-week trial.
Ahmed sarcastically blew a kiss at the couple shortly before the sentence was delivered.
The Metropolitan Police, which is responsible for the national terror hotline, said it would be 'inappropriate' to comment.