Rate of PC 2.5°/°° 5.9°/°° 2.3°/°° 2.9°/°° PC/PI 26.1% 54.1% 30.6% 34.6% Minors/PC 35.3% 7.6% 6.6% 11.1% Road traffic offences/PC NP 38.4% NP NP PC > 24h hrs. 8.8% 15.4% 6.6% 7.7% Length of PC 14 hrs. 30 min. NP NP 16 hrs. PC/month 3.3 1.1 2.8 4.4 No. secure rooms 3 2 2 2 Cleaning 1 per week 1 per month after occupation after occupation Bras systematically taken away no no yes no NP =information not provided PI = persons implicated PC = police custody A few initial observations are required. This data, and the calculation of rates in particular, needs to be treated with greater caution than the data originating from the inspection of police stations, with regard to the number of arrests and placements in police custody, of which the differences from one year to the next can lead to considerable variations. By way of illustration, the data observed at Sainte-Ménehould is as follows: 2009 2010 Persons implicated 199 130 Placements in police custody (PC) 86 34 PI/PC 43.2% 26.1% PC of more than 24 hrs. 31 3 PC > 24 hrs. / PC 36% 8.8% This data can only be interpreted in a valid manner over a long-term period and inspections only enable the collection of figures for a period of two or three years at the most. In 46