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      Ludington Police to discuss Baby Kate disappearance

      Kate's father, Sean Phillips was convicted of unlawful imprisonment and sentenced to 10 to 15 years in prison.

      Authorities investigating the 2011 disappearance of a West Michigan baby plan to release updated information about the case.

      Police in Ludington say a press conference is planned for Wednesday morning about the case of Katherine Phillips. In a statement Tuesday, police said they plan to release "new information related to the use of forensic methods in the investigation."

      Katherine Phillips was 4 1/2 months old when she was last seen in June 2011. She lived with her mother, Ariel Courtland, in Ludington, about 80 miles northwest of Grand Rapids.

      The child hasn't been found despite extensive searches.

      Her father Sean Phillips was sentenced to 10 to 15 years in prison last year for an unlawful imprisonment conviction in the case, which police have said they're treating as a homicide.

      Baby Kate went missing in June of 2011, when her mother, Ariel Courtland reported her as missing. Courtland testified that Phillips allegedly drove off with the child and that was the last time she saw her.

      A letter, apparently written by Sean Phillips in prison, details what happened the day the child disappeared.

      Mason County Prosecuting Attorney Paul Spaniola told 7&4 News that the letter was given to investigative officers by a family member of Baby Kate.

      In March, Phillips' attorney announced that he would be challenging the conviction. The appeal was filed on February 14.