Detectives investigating the death of a newborn baby girl, whose body was discovered in Rainham on 10th April 2011, continue to appeal for help in tracing the mother.
They hope that a 12-month anniversary appeal might prompt someone to come forward.
The body was found by three schoolboys at about 16:40 on 10th April 2011, near a footpath by the Ingrebourne river, off the old A13 (now the A1306 New Road). It was wrapped inside a black bin liner which also contained a distinctive vest thought to be sold by Primark in some European countries only, not the UK.
A post-mortem examination which was held at Great Ormond Street Hospital was unable to establish a cause of death.
Despite their continued efforts, officers from the Child Abuse Investigation Command have been unable to trace the mother.
Detective Inspector Colin Welsh, said: "It is now a year since the baby was found but we have yet to trace the mother. We have carried out extensive inquiries but to no avail. I can only speculate on why she abandoned her baby and I am concerned that she is vulnerable even after all this time.
"The vest inside the bin liner was quite distinctive and I am still hoping that someone might recognise it."
Officers would also like to hear from anyone who might have seen the bag being left in the undergrowth.
The funeral of the unidentified baby was held in Upminster on 2nd September 2011.
Anyone with information relating to this incident is asked to call 020 8217 6555 or to remain anonymous, Crimestoppers on 0800 555 111.