They are essential partners of investigators. The technical and scientific police seek to strengthen their ranks and from Monday open a registration desk for a new recruitment competition. If these “experts” are known to the general public through films and series, they are much less so in reality.

“If you see us, it means that things are going badly, that there is a problem”, laughs Jessica Gadaleta, senior technician of the Technical and Scientific Police (PTS), stationed in Martinique since March 2020.

Different access methods Candidates have until 10 September to register via the site and try to win one of 55 open positions (39 open positions externally, and 39 internal positions). This year, the access modalities have changed. To be able to apply, you must have the bac. “The tests are those of the bac, in mathematics, chemistry and SVT (life and earth sciences)”, explains Jessica Gadaleta.

She notes that it is of a decentralized competition. That is to say that a candidate applying in the Grand Est will go, if selected, to post in this region. “He will not be able to go to Bordeaux”. The number and specialty of open positions are not the same depending on the region.

A wide choice of specialties The range of specialties of the PTS is vast: it goes from conventional forensics (search for papillary traces, samples from the scenes of crimes and offenses, photographs, biology, ballistics etc …) to digital forensics, booming. Within the PTS, certain specialists are rare, such as those who practice morphoanalysis (analysis of blood projections). They are currently only ten.

As for the analyzes and identification of traces of DNA which are also practiced by the PTS, Ms. Gadaleta explains that judges and prosecutors sometimes decide to entrust them to private laboratories, as was the case with a mattress found in the house of Michel Fourniret’s sister .

A “painstaking job” “In an emergency, they make this choice, because a private laboratory can process the request faster than the PTS, in charge of analyzes as numerous as they are varied”, continues the technician. For her, the Technical and Scientific Police, despite its performance, is not for all that the alpha and omega of the resolution of an investigation. “It’s an investigation aid. We bring concrete elements. But sometimes it doesn’t work. We have no elements, no traces. ”

“ The investigation is essential ”, she adds, citing the case of an investigator who in the end of “ant work” succeeded in discovering, three years after the facts, the authors of a burglary with attempted homicide for which no clue had been discovered.