Here is the latest Iowa news from The Associated Press at 3:40 a.m. CST

IOWA CITY, Iowa (AP) — Defense lawyers for a man jailed in the 1990 death of a 9-year-old girl are accusing Iowa prosecutors of letting a key witness give false testimony at three trials in the case. An attorney for Stanley Liggins says he has discovered records showing that prosecution witness Antonio Holmes was given a favorable plea agreement in exchange for his testimony against Liggins. Liggins is preparing to stand trial a fourth time in the death of 9-year-old Jennifer Lewis.

DES MOINES, Iowa (AP) — U.S. Secretary of State Mike Pompeo is on a mission to discuss trade but it’s not to foreign customers it’s with Iowa farmers who are struggling to survive low commodity prices and tariffs that have hurt sales. Pompeo, flanked by U.S. Ambassador to China and former Iowa Gov. Terry Branstad spoke to a group of young suburban Des Moines Future Farmers of America members Monday at a school. Pompeo also is touring a DowDuPont agricultural research facility and addressing Iowa Farm Bureau members.

DES MOINES, Iowa (AP) — Des Moines police say a suspect in a carjacking shot at officers who fired back and killed him. Police say the carjacking victim called 911 early Monday to report he’d been shot when two people stole his vehicle. Police say they spotted the vehicle occupied by two men and a woman. A man and woman were detained, and another man was found later. Three officers ordered him to show his hands, and he fired several shots at them. They returned fire, killing a man identified as Luke Anthony Swann.

DES MOINES, Iowa (AP) — A utility is demanding that a Des Moines zoo start paying its water and sewer bill but the foundation that runs the zoo says that could jeopardize a free ticket program. The Des Moines Register reports that Des Moines Water Works is willing to forgive most of the $5 million that Blank Park Zoo hasn’t paid since 2003, but that it wants $74,000 for water used last year. Zoo president Mark Vukovich says the Blank Park Zoo Foundation was told it wouldn’t have to pay utilities.