So now we know who the mystery priest was who prayed at the Katie Lentz accident and then disappeared.
According to this news story from Yahoo News, the mystery priest was Rev. Patrick Dowling, who is indeed a Catholic priest of the Jefferson County Diocese.
Father Dowling made the following comment:
I had Mass in Ewing MO as the regular priest was sick. As I was returning, I arrived at the scene. The authorities were redirecting traffic. I waited till it was possible to drive up closer. I parked behind a large vehicle about 150 yards from the scene. I asked the Sheriff's permission and approached the scene of the accident. I absolved and anointed Katie, and, at her request, prayed that her leg would not hurt. Then I stepped aside to where some rescue personnel and the pilot were waiting, and prayed the rosary silently. I left when the helicopter was about to take off, and before I got to my car it was on its way to Quincy. I was amazed at the calmness of the two Highway patrol men. The sergeant was completely in control, amazingly calm. Everybody worked as harmoniously as a Swiss watch despite the critical nature of the scene. I gave my name to one of the authorities, perhaps to the sergeant of Highway Patrol, explaining that I was returning having celebrated Mass at Ewing. It was the sergeant who, at the Sheriff's request, gave me Katie's name as I was leaving, so I could visit her in hospital--I assumed she would be taken to Columbia. I think there may have been angels there too and, in this context, I congratulate the fire team from New London and Hannibal, the Sheriff/deputies of Ralls County, the Highway Patrol personnel, the helicopter team, the nurses and all who worked so professionally. God has blessed your work. I hope the credit goes where it is due.