Oct. 13, 2012 -- Police today charged a local actor with second-degree murder in connection with the death of University of New Hampshire student Elizabeth "Lizzi" Marriott, who had been missing for four days, according to the state Attorney General's Office.

Seth Mazzaglia, 29, is scheduled to be arraigned on Monday in connection with Marriott's death, but her body has yet to be recovered, authorities said during a news conference. They found her car, a 2001 Mazda Tribute, in the UNH parking lot.

UNH students are not at risk, Assistant Attorney General James Vara said during the conference, explaining that Marriott and Mazzaglia knew each other.

Marriott, 19, was last seen on Tuesday, and she texted a friend to say she would stop by another friend's home just after 10 p.m. but never arrived. She did not show up for her job at Target on Wednesday and was not in class on Thursday.

Police had established a crime scene on Pierce Island in Portsmouth, N.H. Friday night, where ABC affiliate WCVB-TV in Boston had earlier reported a body was found, and the New Hampshire Union Leader reported the police work was related to the search for Marriott.

Investigators were also searching a Dover, N.H, apartment for evidence, according to the Metro West Daily News.

On a talent website, Mazzaglia described himself as a stage actor "looking to break into film."

"I have some experience writing and directing as well," he wrote. "And in my spare time enjoy teaching Martial Arts and practicing Ballroom Dance."

The UNH homecoming festivities were halted for an announcement to ask fans for information and help earlier today.

Volunteers spent Friday distributing fliers with her photo, a description and a $10,000 reward for her safe return. A team of law enforcement officers including the FBI and the state Attorney General's Office had been searching Dover, Chester and Portsmouth, N.H.

Marriott's uncle, Anthony Hanna, told ABCNews.com on Friday that police were looking through Marriott's phone and computer for information to help with the search. Marriott lived with Hanna and her aunt in Chester and commuted to UNH in Dover.

ABC News' Alyssa Newcomb contributed to this report