Sam is on a mission to help her good friend Patrick figure out who did this to them. In casual conversation, Sam mentions the situation to Rafe, and at that moment he has a very strong look of guilt written all over his face.
In a recent spoiler, information suggests that Rafe has a disturbing flashback/memory. Since we have scene that he has gotten himself into bad habits like stealing money to pay for and use drugs, it isn’t far fetched to make the assumption that he was the one behind the wheel that night, causing Sabrina and Patrick’s accident. The troubled teen has been on a downward spiral ever since the death of his Mother and being rejected by the girl he loves, Molly.
Could this memory be a flashback to what happened the night of the accident? It seems as if the drugs are clouding his mind and judgement. Perhaps Rafe is the one that caused the accident. Keep watching General Hospital on ABC to find out the truth behind the drama.