Added bloody footprints.

code/modules/DetectiveWork/footprints_and_rag.dm

@@ -1,15 +1,16 @@
 /mob
-
 	var/bloody_hands = 0
 	var/mob/living/carbon/human/bloody_hands_mob
-	var/track_blood
-	var/mob/living/carbon/human/track_blood_mob
+	var/track_blood = 0
+	var/list/feet_blood_DNA
 	var/track_blood_type
 
 /obj/item/clothing/gloves
 	var/transfer_blood = 0
 	var/mob/living/carbon/human/bloody_hands_mob
 
+/obj/item/clothing/shoes/
+	var/track_blood = 0
 
 /obj/item/weapon/reagent_containers/glass/rag
 	name = "damp rag"

code/modules/mob/living/carbon/human/human.dm

@@ -1095,4 +1095,10 @@
 		return 0 //already bloodied with this blood. Cannot add more.
 	blood_DNA[M.dna.unique_enzymes] = M.dna.b_type
 	src.update_inv_gloves()	//handles bloody hands overlays and updating
-	return 1 //we applied blood to the item
+	return 1 //we applied blood to the item
+
+/mob/living/carbon/human/clean_blood()
+	.=..()
+	if(istype(feet_blood_DNA, /list) && feet_blood_DNA.len)
+		del(feet_blood_DNA)
+		return 1