The man who murdered and sexually assaulted a model may have attacked another woman just an hour before.
Sally was wearing this same top when she was killed
Forensic evidence has already linked the fatal stabbing of Sally Anne Bowman, 18, in Croydon, south London, to a sex attack in Purley in 2001.
Miss Bowman's partially clothed body was found just yards from her home in the early hours of Sunday.
Earlier a 36-year-old woman was hit on the head with a metal object less than 500m away and her bag was stolen.
The woman had got out of her car in Sanderstead Road, on the south side of Croydon Recreation Ground when her car broke down at about 0300 GMT.
Victim saw knife
She crossed to the other side of the road to get a better signal on her mobile phone.
The man approached her and thinking she was going to be robbed, the woman held out her handbag - but the attacker still hit her.
She suffered injuries to her head, back, arms and hands.
The victim believes the robber, who was white and aged in his 20s, had a knife in his waistband.
A white Prada bag similar to this was stolen from Miss Bowman
He was about 5ft 10in to 6ft, slim to medium build, with short brown hair, and wore a long sleeved jumper and trousers.
A knife was not used in the 2001 sex attack, and the victim survived.
Miss Bowman had been out for a night in Croydon the night she was killed.
She had gone back to a friend's house then back into town before meeting her ex-boyfriend who dropped her off near her home in Blenheim Crescent.
Police said she was killed between 0415 BST and 0430 BST.
Her white Prada leather, half-moon handbag and mobile phone, a Samsung D500, are still missing.
'Miss her terribly'
Four men arrested over Miss Bowman's death, including her ex-boyfriend, have all been released without charge.
Police are appealing for anyone who has been sexually assaulted in the area to come forward and are asking women to remain vigilant.
On Thursday her family paid tribute to her kindness and warmth.
In a statement, they said: "Sally Anne was a kind, loveable girl who brought love and warmth to all that met her.
"Her mum, dad and sisters miss her terribly and her death has shattered the family."