The 18-year-old was found on Monday evening after she left her part-time shop assistant’s job at Laura Ashley in Brunel Retail Park, Rose Kiln Lane.
A jogger in an underpass next to the Foudry Brook discovered the Highdown School pupil’s body at 8.30pm.
Paramedics were first called with police arriving at around 9.15pm.
A post-mortem examination carried out yesterday revealed revealed Asha died of multiple stab wounds.
Detective Superintendent Karen Trego said: “I appreciate that this is an incident of great concern for the Reading community.
“We continue to keep an open mind as to the motive for Asha’s death.
Anyone with any information should contact the incident room and Reading police station on 08458 505 505 or Crimestoppers anonymously on 0800 555 111.