LINCOLN, Neb. (AP) — The Nebraska Court of Appeals has upheld the convictions of an Omaha man serving 14 to 22 years in prison for killing another man.

Carl Heng was convicted last year in Douglas County of manslaughter and a weapons count in the Aug. 24, 2015, shooting death of 25-year-old Robert Lane. Heng acknowledged shooting Lane, but argued it was in self-defense. Prosecutors said Lane was unarmed and not posing a threat to Heng.

On appeal, Heng claimed, among other things, that his trial court was wrong to exclude expert testimony and that there had not been sufficient evidence to convict him.

On Tuesday, the appeals court said Heng’s claims were without merit and that there was sufficient evidence to support the jury’s conclusion that Heng did not act in self-defense.

SOUTH SIOUX CITY, Neb. (AP) — Federal officials say a company whose northeast Nebraska renewable energy plant was the main contributor to toxic odors that drove some people out of their homes has agreed to a $50,000 settlement.

The U.S. Environmental Protection Agency says in a news release Tuesday that Big Ox Energy also agreed to work with the EPA and the Nebraska Department of Environmental Quality to prevent future chemical releases like those that occurred at the company’s South Sioux City plant last year.

EPA investigators found in January that Big Ox discharges at its South Sioux City plant contributed to the creation of toxic gases that sickened a plant worker.

Sewer odor issues blamed on the plant displaced 26 households at their height in 2016.

OMAHA, Neb. (AP) — The federal government is suspending disaster aid for the Omaha Tribe because auditors couldn’t verify how the tribe spent $14 million in past aid.

The Department of Homeland Security said Tuesday that auditors couldn’t find documentation to show how the tribe spent the money it received after the 2011 Missouri River flooding.

The tribe’s attorney didn’t immediately respond to a message Tuesday afternoon.

The flooding covered hundreds of thousands of acres of land along the Missouri River in Iowa, Nebraska and Missouri in 2011 after massive amounts of water was released from upstream dams.

The tribe was forced to close down its casino that employed 181 people and 11 homes had to be rebuilt. Farmland the tribe owned in Iowa and Nebraska was also damaged.

OMAHA, Neb. (AP) — Police say a man shot in north Omaha over the weekend had died of his injuries.

Police say 56-year-old Lionel Johnson died Monday at a hospital. Officers investigating a report of a shooting a day earlier had found him on a sidewalk suffering from a gunshot wound.

Police say the case is being investigated as a homicide.

No arrests had been reported by Tuesday evening.

LINCOLN, Neb. (AP) — A prisoner who helped two other inmates escape a Lincoln prison has been given more time behind bars.

Court records say 27-year-old Brandon D. Williams was sentenced to three to four years in prison — time that will be added to the 10 to 15 years he’s already serving for a robbery in Douglas County. He’d pleaded no contest in the escape case.

Prosecutors say that on June 10 last year, Williams helped Lincoln Correctional Center inmates Timothy Clausen and Armon Dixon hide in a laundry cart before rolling the cart into a laundry truck that was headed to another prison.

They escaped from the truck after it left the center. Dixon was caught the next day in Lincoln, and Clausen was caught five days later at an Omaha apartment.

OMAHA, Neb. (AP) — Authorities say a 31-year-old driver has died in a crash on Interstate 80 in Omaha.

The accident occurred around 2:10 p.m. Tuesday on the east side of the city. The Omaha Police Department says an eastbound sport utility vehicle drifted into another lane and then, when the driver overcorrected, slid across two lanes and struck a parked semitrailer in a construction zone.

Police say the driver died later at an Omaha hospital. He’s been identified as Tyrone Santos Morales, who lived in the Omaha suburb of Bellevue.