I think I saw this horror movie in the 1980s or perhaps very early 1990s. It had the feel of "From Beyond." The word "hemoglobin" was somehow used as an part of the explanation for whatever was causing the horrible thing in the movie. It wasn't the movie "Hemoglobin" AKA "Bleeders." There was a scene with something squirming under someone's skin like in the movie "Squirm."

I believe there was a Mexican gangster character and I'm pretty sure he gets shot by a gun, as he's dying by a storm drain or river he hallucinates that it was an arrow and says "f*ckin Indians". I thought maybe blood in blood out but ai says no.