VIDEO: New search in Emma Caldwell murder hunt

Police investigating the murder of Emma Caldwell 12 years ago are re-examining the area where her naked body was found.

Detectives said the search of woodland near Biggar in South Lanarkshire followed new information received since the investigation was reopened in 2015.

Around 20 specialist officers are scouring two sites - a wooded area and a pond.

Police are hoping to find Emma's clothing and handbag which have never been recovered.

Emma's mother Margaret made a heartfelt plea for information to track down her daughter's killer on the 12th anniversary of her disappearance:

The 27 year old, who had been working as a prostitute, was discovered dead in May 2005, a month after she went missing.

Detective Superintendent David McLaren is heading up the inquiry:

He also revealed more than 5,700 witnesses have been spoken to, around 9,000 items and more than 6,000 documents have been seized, and more than 4,000 hours of CCTV have been identified.

Ms Caldwell turned to drugs, then prostitution to fund her habit, following the death of her sister.

Four men were arrested over her death in 2007 but the case later collapsed.

The last recorded sighting of Ms Caldwell was on Butterbiggins Road on the south side of Glasgow at around 11pm on April 4.

But detectives now believe she may have been seen at the bottom of Argyle Street in Glasgow at around 11.30pm on the night she went missing.

Ms Caldwell, originally from Erskine in Renfrewshire, may have been seen getting into a black saloon car similar to a BMW that may have been owned by someone in the Dumfries area who regularly came to Glasgow.

Mr McLaren added: "I'd like to finally appeal directly to those closest to Emma's killer and who have suspicions. You may be a parent, a brother, a sister or partner of the person who took Emma from this world.

"I'd ask you to look in the mirror and ask yourself how you would feel if Emma was your daughter or sister. I need you to do the right thing and get in touch.''