He holds her tighter as she sobs, gently stroking her hair as he talks to the policeman.

"An hour ago? Maybe more, I'm not sure. I was on my way there to watch the experiment - I'm a theoretical physicist specialising in spacetime - but I was late. Probably a good thing, since all the others who were there are nowhere to be found. I got this phone call from Gwen, all hysterical about demons, so I brought her back here in her car and called the emergency services."