Aravindan Balakrishnan, 73, referred to as Comrade Bala, and his 67-year-old wife Chanda were arrested last week over allegations of keeping three women in slave-like conditions in their south London flat for three decades.
A local shopkeeper recalls the couple trying to influence his 10-year-old son in the 1970s when Comrade Bala led the Workers' Institute of Marxism-Leninism-Mao Zedong Thought from a bookshop in Brixton area of south London.
"I knew they were trying to recruit people...They said they had seen what Mao had done for China and wanted to do the same here. It (bookshop) was open in the evenings. I would see lots of men and women and children too in there when I was on my way home from work. They would also go door-to-door trying to recruit," he added.
Wahab's sister flew down to the UK this week from Malaysia for an emotional reunion with her long lost sister.
Scotland Yard have been interviewing the three alleged captives to start building a case around the allegations against Bala and Chanda.