Police officers in Essex have drained a pond near the scene where Saudi Arabian student Nahid Almanea was murdered in Colchester last Tuesday and are carrying out an "intensive fingertip search."
The 31-year-old was stabbed 16 times and left to die as she walked along a quiet footpath in the town.
The search came as Detective chief superintendent Steve Worron issued a new appeal for information about a man seen wearing a "distinctive" beige-coloured jacket while walking along the Salary Brook Trail, where Ms Almanea was killed, around the time of the attack.
Essex Police have released a picture of a distinctive jacket worn by a man seen on the Salary Brook Trail just before Nahid Almanea's body was found. The man wearning it was seen walking towards the Greenstead estate between 10.20am and 10.40am.
He is described as being aged in his late teens to 30. He had very black, thick hair which was quite short and a two to three inch mop style on top. He was clean shaven, of average build with a tanned face. He wore baggy trousers, which may have been lightweight cotton.
He was wearing a very distinctive jacket described as an Italian designer item in either suede or leather. it was slightly longer than waist-length, had brown buttons up the front and two pockets also with buttons. It was beige and had a belt.
Essex Police say they're continuing to search for a murder weapon near Salary Brook Trail in Colchester where Nahid Almanea was found murdered on Tuesday June 17. They have yet to recover any knife or bladed weapon with a proven link to the killing.
One of the three fishing lakes nearby has been drained and specialist officers are searching the area. The other two lakes will also be drained.
Police are urging people in Colchester to check their gardens, hedges, rubbish bins, and communal areas around flats for any trace of any discarded weapons or blood stained clothing or footwear.