From the Massai report:
[185] * With * respect * to * the * activity * of * searching * for * and * collecting * the * various * specimens, *she *emphasised *that *she *operated *according *to *selective *criteria, *as *it *was * not *possible *to *collect *everything. *Thus, *she *proceeded *by *first *giving *precedence *to * collecting * the * obvious * biological * specimens, * then * seeking * non-*‐‑obvious * biological * traces * and, * above * all, * potential * specimens * of * blood, * using * the * customary due care and precaution necessary to ensure optimal * preservation * of * the * crime * scene, * and * to * avoid * "ʺany * careless * handling * of * things * which * might * cause * contamination"ʺ * (page * 44, * transcripts); * the * purpose * of * this * was * both * to * protect * the * collector * who * might * come * into *contact *with *pathogenic *substances *and *to *protect *the *biological *specimens. *The * collector *"ʺmust *take *care *not *to *contaminate *any *possible *findings *and *traces *with *his * own * DNA...for * this * reason * he * uses * personal * protective * devices * which * are * gloves, * suits, *shoe-*‐‑covers *and *masks, *in *order *to *avoid *any *exchanges *between *himself *and * his * surroundings; * obviously * he * must * also * prevent * the * findings * from * contaminating * each *other"ʺ *and *to *this *end *"ʺeach *separate *specimen *or *trace *is *preserved...in *a *safety * bag"ʺ * (page * 45); * for * the * sample * gathering * phase * sterile * single-*‐‑use * material * was * used * such *as tweezers, scalpels and test tubes.
(sorry about all the asterisks)
As we know from the video, the last sentence is not true for the bra clasp.
[185] * With * respect * to * the * activity * of * searching * for * and * collecting * the * various * specimens, *she *emphasised *that *she *operated *according *to *selective *criteria, *as *it *was * not *possible *to *collect *everything. *Thus, *she *proceeded *by *first *giving *precedence *to * collecting * the * obvious * biological * specimens, * then * seeking * non-*‐‑obvious * biological * traces * and, * above * all, * potential * specimens * of * blood, * using * the * customary due care and precaution necessary to ensure optimal * preservation * of * the * crime * scene, * and * to * avoid * "ʺany * careless * handling * of * things * which * might * cause * contamination"ʺ * (page * 44, * transcripts); * the * purpose * of * this * was * both * to * protect * the * collector * who * might * come * into *contact *with *pathogenic *substances *and *to *protect *the *biological *specimens. *The * collector *"ʺmust *take *care *not *to *contaminate *any *possible *findings *and *traces *with *his * own * DNA...for * this * reason * he * uses * personal * protective * devices * which * are * gloves, * suits, *shoe-*‐‑covers *and *masks, *in *order *to *avoid *any *exchanges *between *himself *and * his * surroundings; * obviously * he * must * also * prevent * the * findings * from * contaminating * each *other"ʺ *and *to *this *end *"ʺeach *separate *specimen *or *trace *is *preserved...in *a *safety * bag"ʺ * (page * 45); * for * the * sample * gathering * phase * sterile * single-*‐‑use * material * was * used * such *as tweezers, scalpels and test tubes.
(sorry about all the asterisks)
As we know from the video, the last sentence is not true for the bra clasp.