In Amsterdam’s Red Light District, the hologram of a women sits behind a window. She looks out as passers-by, then appears to knock on the window and breathe on the glass. The glass seemingly fogs up,

Dutch police are getting creative, and high tech, in their search for the killer of a 19-year-old sex worker stabbed to death 15 years ago. The Guardian reports that authorities are now displaying a life-size hologram of Bernadett "Betty" Szabo in the windows of a corner house in Amsterdam's Red Light District,

The hologram looks out at passers-by, then appears to knock on the window and breathe on the glass. The glass seemingly fogs up, and the word “help” appears.

Dutch detectives have created a hologram of sex worker Betty Szabó killed in Amsterdam 15 years ago, to generate new leads. Anne Dreijer-Heemskerk from the police said the hologram serves as a symbol to remind the public of the unsolved case.