(Iron Ridge) An Iron Ridge man accused of contributing to a fatal opioid overdose was in a Dodge County courtroom Thursday. Judge Steven Bauer found probable cause and Timothy Sedlmeier was bound over for trial on one felony count of First Degree Reckless Homicide. Sedlmeier is accused of supplying the heroin that led to the October 2017 death of a Waupun teen. Prosecutors say the 28-year-old had known the victim, Samantha Mattila, for approximately one year. They had spent the days leading up to her death together, reportedly snorting heroin. Sedlmeier says he fell asleep on the couch the night she died and when he woke up, he found the 19-year-old slumped over the bathtub. The heroin that he put in a drawer for himself, he said, was gone. He assumed she had taken it. He allegedly told investigators that he bought the heroin that she used but did not supply it to her. Toxicology tests later confirmed that Mattila died of the synthetic opioid Fentanyl, which is said to be up to 200 times as potent as morphine and is responsible for scores of deaths nationwide. If convicted, Sedlmeier is facing a maximum prison sentence of 40 years. He will be arraigned on December 18.