Here is the latest Iowa news from The Associated Press at 5:20 a.m. CST

DES MOINES, Iowa (AP) — The Iowa Supreme Court has upheld a legal doctrine that allows agriculture drainage districts to maintain immunity from lawsuits seeking monetary damages. The ruling Friday presents an obstacle for the Des Moines Water Works, which has alleged in a lawsuit that the three counties should be required to obtain federal water pollution discharge permits and reimburse the utility for increased filtration methods to remove the nitrates.

AMES, Iowa (AP) — Iowa State University has released a document that President Steven Leath says supports his use of a school plane for a largely personal trip to North Carolina. Leath has claimed he planned to meet with a donor and so the use of the plane had a business purpose, as required by law. The school released what it called the contents of a text message showing the donor cancelled the day of the meeting due to an emergency.

HARTFORD, Iowa (AP) — Officials in southern Iowa have identified a man whose body was found inside a burning home last week. The Warren County Attorney’s Office says an autopsy shows that 50-year-old Robert Paul Major died in the Jan. 20 fire. Major’s son, 28-year-old Stephen James Major, remains in the Warren County Jail on charges of first-degree arson and operating a motor vehicle without the owner’s consent.

IOWA CITY, Iowa (AP) — A 65-year-old woman has been arrested on harassment charges after police say she threatened employees of the University of Iowa’s student newspaper. The Iowa City Press-Citizen reports that Melyssa Jo Kelly called the Adler Journalism and Mass Communication building on Dec. 1 and threatened people at the Daily Iowan in profanity-laced rants. Police say she also left threatening voice messages at the paper. Kelly has been charged with six counts of first-degree harassment.