I'm just waiting for a better idea before dumping this hot garbage again

code/game/objects/effects/decals/cleanable/gibs.dm

@@ -21,6 +21,9 @@
 
 
 /obj/effect/decal/cleanable/blood/gibs/update_icon()
+	GET_COMPONENT(D, /datum/component/forensics)
+	if(D)
+		Blood_DNA = D.blood_DNA
 	add_atom_colour(blood_DNA_to_color(), FIXED_COLOUR_PRIORITY)
 	cut_overlays()
 	var/mutable_appearance/guts = mutable_appearance(icon, "[icon_state]_guts")

code/game/objects/effects/decals/cleanable/humans.dm

@@ -11,6 +11,8 @@
 
 /obj/effect/decal/cleanable/blood/replace_decal(obj/effect/decal/cleanable/blood/C)
 	C.add_blood_DNA(return_blood_DNA())
+	if(C.Blood_DNA.len)
+		Blood_DNA |= C.Blood_DNA.Copy()
 	if (bloodiness)
 		if (C.bloodiness < MAX_SHOE_BLOODINESS)
 			C.bloodiness += bloodiness
@@ -26,6 +28,9 @@
 	update_icon()
 
 /obj/effect/decal/cleanable/blood/update_icon()
+	GET_COMPONENT(D, /datum/component/forensics)
+	if(D)
+		Blood_DNA = D.blood_DNA
 	color = blood_DNA_to_color()
 
 /obj/effect/decal/cleanable/blood/old

code/modules/clothing/clothing.dm

@@ -346,7 +346,10 @@ BLIND     // can't see anything
 
 /obj/item/clothing/transfer_blood_dna(list/blood_dna)
 	..()
-	var/list/blood_list = list(return_blood_DNA())
+	var/list/blood_list
+	GET_COMPONENT(D, /datum/component/forensics)
+	if(D)
+		blood_list = D.blood_DNA
 	if(blood_list.len)
 		last_bloodtype = blood_list[blood_list[blood_list.len]]//trust me this works
 		last_blood_DNA = blood_list[blood_list.len]

code/modules/detectivework/detective_work.dm

@@ -113,7 +113,10 @@
 
 //to add blood dna info to the object's blood_DNA list
 /atom/proc/transfer_blood_dna(list/blood_dna)
-	var/list/blood_DNA = return_blood_DNA()
+	var/list/blood_DNA
+	GET_COMPONENT(D, /datum/component/forensics)
+	if(D)
+		blood_DNA = D.blood_DNA
 	if(!blood_DNA)
 		blood_DNA = list()
 	var/old_length = blood_DNA.len
@@ -125,7 +128,6 @@
 	return
 
 /obj/effect/decal/cleanable/blood/blood_DNA_to_color()
-	to_chat(world, "blood dna to color called by [src]")
 	var/list/colors = list()//first we make a list of all bloodtypes present
 	for(var/bloop in Blood_DNA)
 		if(colors[Blood_DNA[bloop]])
@@ -135,7 +137,6 @@
 
 	var/final_rgb = BLOOD_COLOR_HUMAN
 
-	to_chat(world, "colors has [colors.len] bloodtypes in it")
 	if(colors.len)
 		var/sum = 0 //this is all shitcode, but it works; trust me
 		final_rgb = bloodtype_to_color(colors[1])