His latest detention comes less than a week after he was released from jail on parole.
"May he work in peace," one netizen joked.
There were no visible bloodstains on the grass or nearby surfaces where the man's body was found.
He was said to be operating without a valid food retail licence.
He also yanked her hair, slapped her, and threw a phone case at her on different occasions.
The Singapore licence plate was found to be invalid.
He lost eight family members, including his son, when a flash flood swept through their home.
He pretended to be doing charitable work and even recruited seven individuals.
Through this, the government hopes to prevent cross-generational cybercrime, including paedophilia.
Neighbours battled the blaze for 10 to 15 minutes until the authorities arrived.