Autopsy reports showed that Teo was restrained and put up a fierce struggle against her killer(s) before her death from excessive blood loss.

Born in 1967, Winnifred Teo Suan Lie was the second of three children, and she had both an elder sister and a younger brother.

Due to her waist-long hair and tanned skin, Teo was mistaken for a Eurasian when she was actually an ethnic Chinese Singaporean.

During the final days leading up to her death, Teo jogged in the evenings to prepare herself for a school adventure camp.

[2] On the evening of 22 May 1985, Teo went out for a jog at Bukit Batok Nature Park as usual, leaving her Maryland Drive terrace house at 6:00 PM.

Officers from Tanglin Police Division conducted a search for Teo in the nearby areas where she usually jogged.

The school's students underwent a school-organised mourning period and received early dismissals following the discovery of Teo's body.

Over 500 people, including family members and classmates, showed up at her funeral to mourn Teo's death.

[6][7] The murder of Teo led to Raffles Junior College warning its 1,700 students that girls should move in groups of "at least two or three".

[9][10][11] An autopsy report by pathologist Clarence Lim confirmed that Teo was raped before her death, and she was attacked by more than one person.

In February 2000, 27-year-old financial executive Linda Chua was found brutally assaulted and raped at Bukit Batok Nature Park while jogging there.

[20][21] In 2021, due to the renewed public attention to the unsolved 1995 rape-murder of seven-year-old Lim Shiow Rong, as well as the arrest of Ahmad Danial Mohamed Rafa'ee for the alleged murder of missing student Felicia Teo Wei Ling, the Winnifred Teo case and those of Dini and Chua were again caught in public spotlight as they were also unsolved, their killer(s) not arrested and/or their victims being raped and killed.