DELPHI, Ind. — Indiana State Police is expected to give a news conference announcing an arrest in the murders of Abby Williams and Libby German. Anna Williams, Abby's mother, confirmed the information to 13News. Police said they would give an update on the case during the news conference. Kelsi German, Libby's older sister, said the news conference would be Monday at 10 a.m. on Twitter. She ended the tweet saying, "Today is the day."