Overhauls in-game forensics system to be more in-depth.

code/modules/reagents/Chemistry-Reagents.dm

@@ -958,6 +958,62 @@ datum
 				..()
 				return
 
+
+
+		luminol
+			name = "Luminol"
+			id = "luminol"
+			description = "A compound that interacts with blood on the molecular level."
+			reagent_state = LIQUID
+			color = "#F2F3F4"
+			overdose = REAGENTS_OVERDOSE
+
+			reaction_obj(var/obj/O, var/volume)
+				if(istype(O,/obj/effect/decal/cleanable/blood))
+					var/obj/effect/decal/cleanable/blood/W
+					W.invisibility = 1
+					W.color = "#007fff"
+					W.basecolor = "#007fff"
+				else if (istype(O, /obj/item/))
+					var/obj/item/I = O
+					I.reveal_blood()
+					return
+				else
+					return
+
+			reaction_turf(var/turf/T, var/volume)
+				if(volume >= 1)
+					if(istype(T, /turf/simulated))
+						var/turf/simulated/S = T
+						S.dirt = 0
+					T.clean_blood()
+					for(var/obj/effect/decal/cleanable/blood/C in T.contents)
+						C.invisibility = 1
+						C.basecolor = "#007fff"
+						C.color = "#007fff"
+						if(istype(C, /obj/effect/decal/cleanable/blood/tracks/footprints))
+							var/obj/effect/decal/cleanable/blood/tracks/footprints/D = C
+							for(var/datum/fluidtrack/E in D.stack)
+								E.basecolor = "#007fff"
+								D.update_icon()
+					return
+
+			reaction_mob(var/mob/living/carbon/human/H, var/method=TOUCH, var/volume)
+				if(H.head)
+					if(H.head.reveal_blood())
+						H.update_inv_head(0)
+				if(H.wear_suit)
+					if(H.wear_suit.reveal_blood())
+						H.update_inv_wear_suit(0)
+				else if(H.w_uniform)
+					if(H.w_uniform.reveal_blood())
+						H.update_inv_w_uniform(0)
+				if(H.shoes)
+					if(H.shoes.reveal_blood())
+						H.update_inv_shoes(0)
+				else
+					return
+
 		space_cleaner
 			name = "Space cleaner"
 			id = "cleaner"
@@ -967,11 +1023,14 @@ datum
 			overdose = REAGENTS_OVERDOSE
 
 			reaction_obj(var/obj/O, var/volume)
-				if(istype(O,/obj/effect/decal/cleanable))
+				if(istype(O,/obj/effect/decal/cleanable/blood))
+					O.invisibility = INVISIBILITY_MAXIMUM
+					return
+				else if(istype(O,/obj/effect/decal/cleanable/))
 					del(O)
 				else
-					if(O)
-						O.clean_blood()
+					O.clean_blood()
+					return
 
 			reaction_turf(var/turf/T, var/volume)
 				if(volume >= 1)
@@ -980,8 +1039,13 @@ datum
 						S.dirt = 0
 					T.clean_blood()
 					for(var/obj/effect/decal/cleanable/C in T.contents)
-						src.reaction_obj(C, volume)
-						del(C)
+						if(istype (C,/obj/effect/decal/cleanable/blood))
+							src.reaction_obj(C, volume)
+							C.invisibility = INVISIBILITY_MAXIMUM
+							return
+						else
+							src.reaction_obj(C, volume)
+							del(C)
 
 					for(var/mob/living/carbon/slime/M in T)
 						M.adjustToxLoss(rand(5,10))

code/modules/reagents/Chemistry-Recipes.dm

@@ -713,6 +713,12 @@ datum
 			required_reagents = list("ammonia" = 1, "water" = 1)
 			result_amount = 2
 
+		luminol
+			name = "Luminol"
+			id = "luminol"
+			result = "luminol"
+			required_reagents = list("hydrogen" = 3, "carbon" = 3, "ammonia" = 3)
+
 		plantbgone
 			name = "Plant-B-Gone"
 			id = "plantbgone"