Here is the latest Iowa news from The Associated Press at 4:45 a.m. CST

GUTHRIE CENTER, Iowa (AP) — Preliminary autopsy results show four people who died in a small plane crash in central Iowa earlier this month were suffering from carbon monoxide poisoning. Television station KCCI reports that the Iowa State Medical Examiner’s Office report said all the victims died from “multiple blunt force injuries in the setting of carbon monoxide toxicity.” The crash happened the night of Nov. 9 after plane passengers reported the pilot had had an apparent heart attack.

OSCEOLA, Iowa (AP) — The Iowa State Patrol says a pregnant woman and her 2-year-old stepson have died in a crash in south-central Iowa. Television station KCRG reports that the crash happened Friday evening in Clarke County, about 9 miles south of Osceola. The patrol says 22-year-old Bethannie Kennedy, of Osceola, was driving south on U.S. 69 when she lost control, went sideways and was broadsided by a northbound pickup truck. Kennedy and 2-year-old Michael Dohrn Jr. died from injuries received in the crash.

DES MOINES, Iowa (AP) — A former northeastern Iowa high school teacher arrested in April for being drunk at work has had his teaching license suspended. The Waterloo-Cedar Falls Courier reported Friday that Daniel Reisner’s license was suspended for two years by the Iowa Board of Educational Examiners. He must complete at least 15 in-person class hours of an ethics course before his license is reinstated. He also received a written reprimand.

WASHINGTON (AP) — Republican Sen. Charles Grassley of Iowa is giving up the chairmanship of the Senate Judiciary Committee in the next Congress. Instead, he will chair the Senate Finance Committee. That means Sen. Lindsey Graham of South Carolina will take over the chairmanship of the Judiciary panel. Graham has become a close Trump ally and was a vocal supporter of Brett Kavanaugh’s confirmation to the Supreme Court.