The search for 19 year old Elizabeth Marriott continued on Tuesday, one week since she went missing following a three hour class at UNH. Officials continue to focus on the waters off Peirce Island with side scan sonar and an underwater camera. Authorities also brought out a K-9 cadaver dog to search the island.  Authorities say 29-year-old Seth Mazzaglia either suffocated or strangled Marriott in his Dover apartment on Oct. 9, the same day she was last seen. He has been charged with second-degree murder. A new picture is starting to emerge of Mazzaglia. He had an account on OK Cupid.com with the user name DarkKaiser, a user name also being used by a 29 year old Dover resident on Fet Life.com, an online site for fetish enthusiasts. Other media outlets are suggesting that a sexual encounter is at the heart of this case, but thus far Senior Assistant Attorney General Jane Young won’t comment on that aspect of the case.