NEW YORK ( CNN ) -- Over the past year , searchers have taken to the woods , waterways and even the skies over Bolingbrook , Illinois . They 've looked , and then they 've looked again . Stacy Peterson disappeared on October 28 , 2007 , and police consider her husband the prime suspect . But there 's been no sign of Stacy Peterson , the 23-year-old fourth wife of former Bolingbrook police sergeant Drew Peterson . Police have named Peterson a suspect in his wife 's disappearance . He maintains he is innocent , and says she ran off with another man . The Peterson case has become a cable television staple and has spawned several books . But as Stacy Peterson 's disappearance approaches the one-year mark , police seem no closer to solving the mystery than they were on October 28 , 2007 . That morning , a Sunday , Drew Peterson , now 54 , says he awoke at his suburban tract home to find his wife gone . He says he received a phone call from her at 9 p.m. She said that she was leaving him , Peterson says . Police confirm there was some activity on Stacy Peterson 's cell phone around 9 p.m. on October 28 , but her family and close friends say she would never leave her two children behind or go away without mentioning it to her family . In the days leading up to her disappearance , Stacy Peterson confided in friends and her sister . She said she was afraid of her husband and wanted to leave him , according to her sister , Cassandra Cales . `` If anything happens to me , he killed me . It was n't an accident , '' Cales quoted her as saying . Watch how the case has unfolded » . At 10 a.m. that Sunday morning , Stacy Peterson called a friend and scheduled an afternoon appointment . It was the last time anyone in her close circle of family and friends heard from her . She never showed up for the appointment , and was not seen or heard from again . Worried , Cales called the police that Monday , October 29 , and reported her sister missing . The media frenzy and police scrutiny soon revealed that Drew Peterson 's third wife had died mysteriously a few years before while in the throes of a nasty divorce . Kathleen Savio died just before the division of the marital assets was finalized , making Drew Peterson the sole beneficiary . Savio was found drowned in the dry bathtub of her home . At the time , the death was ruled an accidental drowning . But her family continued to insist that Savio died as a result of foul play . The investigation into Stacy Peterson 's disappearance brought renewed interest in Savio 's death . Authorities exhumed Savio 's body , further tests were conducted , and her death has now been ruled a `` homicide staged to look like an accident . '' Witness statements that have been leaked to the media portray Drew Peterson as jealous , possessive and controlling . He was said to keep such close track of his wife that he frequently called her on her cell phone and appeared unannounced at social outings to take her home . This caused tension in the marriage , the witnesses told police . Police named Drew Peterson as the prime suspect in his wife 's disappearance in November 2007 . He has not been charged in the case , but he has been charged with illegal gun possession , which could put him behind bars for up to five years if he is convicted . Drew Peterson continues to insist that his wife left of her own accord and ran off with another man . Asked why he believes this , he responds that she called him and told him so . He also says that she had a number of younger male friends during their marriage . He adds that although it is embarrassing for him to admit it , he often had to deal with her flirtations . He paints himself as a victim left holding their household together and raising their children while living under an umbrella of suspicion and near-constant police and media scrutiny . Watch how he failed a lie detector test » . The investigation remains open and police and family urge anyone with information about Stacy Peterson 's whereabouts to call 815-740-0678 or the family tip line : 866-847-5143 . A $ 35,000 reward is being offered for information that leads to Stacy Peterson or to the conviction of the person responsible for harming her . She is 5 feet 2 inches tall , weighs 100 pounds and has brown hair and brown eyes . She has a blue and yellow carnation tattoo on the small of her back and red cherries tattooed on her left front hip .
Stacy Peterson disappeared on October 28 , 2007 . She was in a tumultuous marriage with a possessive husband , friends say . Drew Peterson , an ex-cop , is prime suspect , but says she ran off . Score: 6 Call 815-740-0678 or the family tip line , 866-847-5143 .