[3] It was a great revolution in the field of forensic identification since this light could be used at the crime scene, unlike lasers at that time.

In 1986, he became the fourth director of the Institute of Forensic Science and Criminology (IPSC) of the University of Lausanne; he has been on charged until 2016.

In 1972, he participated, in Northern Ireland, to the investigation of the Bloody Sunday with Doug Lucas and Peter Forest.

[6] In 1989, while working at the Australian National University in Canberra, Australia, he participated (with Ron Warrener, Hilton Kobus, Milutin Stoilovic and Chris Lennard) to the invention of the Polilight.

[7] He participated, among other during his career, to the investigation of the massacres of the Order of the Solar Temple (1994–1997) in Canada and in Suisse as well as on the Omagh bombing in Northern Ireland (1998, with Doug Lucas and Peter Forest).