Stephen bumel said that he would then take the syringe from the cart, replace the needle with a different one and use it to inject himself. Then he would put the original needle back on the empty syringe, fill it with sailing and put it back on the cart before the nurse noticed. The plastic syringe can easily become contaminated with blood when it is injected into a patient. And so what was happening is, stephen bumel was injecting a fentinal syringe into his vein,. A little bit of his blood was getting back flowed into the syringe, contaminating it. When he refilled the syringe with sailine and then dropped it, did the slight of