The Wrath of Angels- A Doctor Who and Supernatural FanFic

A string of strange murders have been happening in a small, ordinary town. There have been no survivors no witnesses until a high school teacher comes home to find his wife, dead, with her neck snapped. He is initially a suspect for his wife's murder, but claims that when he found her body he wasn't alone. Upon waking up in a hospital bed, he claims that his wife was killed by an angel. His story sounds crazy and the police dismiss it as the rantings of a man turned mad with grief. But is he crazy? Men, claiming to be FBI agents show up and take over the investigation and an odd man who calls himself "The Doctor" soon follows. Do these four strangers have a chance of ending these odd killings, or will they too fall victim to the wrath of angels?