A 73-year-old ethnic Indian Singaporean man , Aravindan Balakrishnan , and a 67-year-old Tanzanian woman , his wife , Chanda Pattni , had been investigated Criminal_investigation for slavery Committing_crime and domestic servitude Committing_crime .

In the early 1980s after a police raid Attack , Balakrishnan decided Deciding to move Motion the group 's activities underground .

Balakrishnan 's control Control over his followers intensified Cause_change_of_strength and the commune became Becoming a prison to his followers .