The remanded accused is Ibrahim Hossain Hridoy, 19. He was arrested from Narayanganj's Bhulta on Tuesday night.
Metropolitan Magistrate Court Judge Md Jashim passed the order when investigation officer of the case and inspector of Badda Police Station Abdur Razzak placed him before the court seeking a 10-day remand for interrogation.
Earlier on Monday three other accused- Bacchu, Bappi and Shahin- were put on a four-day remand each in the case.
Besides, Zafor, an accused in the case, gave his confessional statement under section 164 admitting his involvement in the incident.
On July 20, Taslima Begum Renu was beaten to death allegedly by angry mob over child lifting rumour at North Badda in the city.
The victim's family member claimed that Taslima went to the area to look for a suitable school for her children.