New CCTV images were found of murder victims US tourist Sarai Sierra, Video footage appears to Sarai been followed.

On Monday, prosecutors were given permission to take blood and DNA samples from 21 people who have been questioned about Sierra’s death.

A post-mortem examination has been carried out on Sierra’s body and DNA samples have been sent to a crime laboratory, it added.

Police were still using sniffer dogs to search the area where Sierra’s body was found.

Some new details about the ongoing investigation have emerged.

The man identified as “Taylan,” who arranged to meet Sierra by Galata Tower before she went missing on Jan. 21 gave DNA and sperm samples to the police, Turkish daily Vatan reported today.

Taylan told the police that Sierra and he had sexual intercourse when they met before she went missing. It was known that Sierra and Taylan met on Jan. 13.

Sierra’s jacket and a bag were also missing and police are searching for them along with Sierra’s smartphone and tablet computer, the daily reported.

Turkish police hope DNA samples from 21 people being questioned in the case will be key to finding the perpetrator.

“They’re still investigating, so they might think it might be a robbery, but they’re not sure,” said Betsy Jimenez, Sierra’s mother, at a press conference Feb. 4 in New York City, New York Daily News reported.

[adrotate banner=”54″]