Nov 7, 2005 6:26 am US/Central

(CBS) MISHICOT, WI Authorities plan to hold a news conference this afternoon at 3 p.m. at the Mishicot Fire Department to give more details on the disappearance of Teresa Halbach.



CBS 5's Angenette Levy attended a press conference Sunday afternoon, where authorities stated that the woman's disappearance is still a missing persons case.



Calumet County Sheriff Jerry Pagel said Halbach's parents reported her missing Thursday, and his department and police in Manitowoc County immediately began investigating. Authorities found Halbach's Toyota RAV-4 in a gravel pit near the Avery Auto Salvage near Mishicot on Saturday.



Steven Avery, who lives on the property, is the Two Rivers man who was released from prison in 2003 after DNA evidence exonerated him in the 1985 attack. Avery told investigators Thursday evening that Halbach took pictures of a van that he wants to sell.



Avery and another man in the area are the last to have seen Halbach, but it's unclear who saw her last, said Calumet County Sheriff Jerry Pagel.



"I'm classifying it as coincidental at this particular time," Pagel said. "Just because it's Steven Avery, doesn't mean that he had anything to do with it." Authorities report that Avery was Halbach's second of three appointments on Monday, and she did arrive at her third appointment on Monday.



Calumet County has been named the lead investigative agency in this case, and anyone with information relevant to this case are asked to call the Calumet County Sheriff's Office at 920-849-2335.



CBS 5's Angenette Levy reports that at Sunday's press conference, Sheriff Jerry Pagel of the Calumet County Sheriff's Department stated that they will be executing a lengthy search of the salvage property that will cover a 40 acre parcel of land and hundreds of vehicles.



Also, dive teams from the Winnebago County Sheriff's Department are being utilized. Pagel said that there is water adjacent to the area in question.



Sgt. Mark Wiegert of the Calumet County Sheriff's Department said Teresa Marie Halbach, a resident of the St. John area, was last seen about 1:30 p.m. Monday in Manitowoc.



Pagel said Halbach has no criminal, medical or mental history indicating she may have left on her own.



Halbach is described as 5-foot-6 and 135 pounds, with light brown hair and brown eyes.



She was wearing blue jeans, a white button-down shirt and a summer jacket when she last seen, police said.

