Teagan was born in Dublin, Ireland, but quickly immigrated to London. Teagan is a highly intelligent and detail-oriented man. He prefers a good mystery over a boring crime. However, his social skills are rusty and he doesn't see boundaries or filters in his speech, saying anything even rude that comes to his mind. Teagan mostly focused on his work, but never miss a chance to hook up and drink to relax his busy mind, but avoids any relationship, even friendship.