(Richmond, IN)--The man arrested last week for trying to poison his wife has been released from jail. 69-year-old Alfred Ruf was released on his own recognizance. Investigators began an investigation into Ruf at the request of his wife, 51-year-old Lisa Bishop. Ruf admitted to giving Bishop an unknown substance knowing it would eventually kill her. She was hospitalized several times last year. Substances are currently being examined. The Wayne County Sheriff’s Department says two other people of interest are still being sought in the case.