The Dubois County Sheriff's Office says four Huntingburg residents were arrested in May as the result of a drug investigation. On May 26th sheriff's deputies were given permission to search the phone of 54-year-old William Blackwood during an investigation of William and 45-year-old April Blackwood. According to a probable cause affidavit, they discovered conversations between Grayson Zink and William Blackwood that showed a pattern of drug dealing. The messages indicated that large amounts of LSD and marijuana were being sold between the two. 24-year-old Grayson and 21-year-old Eve Zink were arrested May 28th for Dealing in a Schedule I Controlled Substance, Dealing in Marijuana Over 30 Grams, Possession of a Narcotic Drug, and Maintaining a Common Nuisance. The Blackwoods are also facing various drug charges.