LINCOLN, Neb. (AP) — A mistrial has been declared in the case of an Arizona man charged with sexually assaulted another student in a dorm at the University of Nebraska-Lincoln.

The case against 19-year-old Christopher Petersen went to jurors Thursday, but they were unable to reach a verdict by Friday afternoon and a mistrial declared.

Prosecutors say Petersen and the woman went to her room on Sept. 5 last year and began kissing. The woman told investigators that Petersen continued kissing and groping her after she told him to stop. Petersen said he never heard her say no.

Prosecutors must decide whether to try the case again or drop the charge against Petersen. Defense attorney Bob Creager (KREE’-gur) says he’ll also consider his client’s options.

ELGIN, Iowa (AP) — A 4-year-old boy has died after being shot in the head in a small town in Iowa.

The Fayette County Sheriff’s Office says deputies found the boy with a gunshot wound to his head in Elgin after two 911 calls Friday afternoon.

The child was pronounced dead at a hospital in West Union. Two adults and two small children were also at the scene.

Authorities haven’t released any additional details about the shooting, including how it happened or the boy’s name.

The Sheriff’s Office has asked the Iowa Division of Criminal Investigation for assistance.

Elgin is a town of about 680 people that’s about 170 miles northeast of Des Moines.

LINCOLN, Neb. (AP) — A jury will resume deliberations Friday on whether a student from Arizona sexually assaulted another student in a dorm at the University of Nebraska-Lincoln.

The case against Christopher Petersen went to jurors Thursday, but they were unable to reach a verdict.

A court affidavit says Petersen and the woman went to the woman’s room on Sept. 5 last year and began kissing. The woman told investigators that Petersen continued kissing and groping her after she told him to stop. Petersen said he never heard her say no.

The 19-year-old Petersen is from Scottsdale, Arizona.

Defense attorney Bob Creager (KREE’-gur) said in his closing arguments that the issue isn’t whether the woman consented, but “whether she conveyed her lack of consent.”

SCHUYLER, Neb. (AP) — Authorities have released the name of a teenage girl who was fatally injured in a Schuyler crash after a brief police chase.

Colfax County authorities identified the 15-year-old as Isabella Brandt, of Schuyler.

The accident occurred around 11:15 p.m., on Wednesday, after officers pursued a car that was being driven erratically. The officers soon halted the pursuit because of safety concerns. Within minutes, they were sent to check a report that the car had rammed a tree.

Brandt was found on the ground near the car. Authorities say she was flown to a Lincoln hospital, where she was pronounced dead. The driver was flown to an Omaha hospital for treatment, and a 15-year-old male passenger was taken to a Schuyler hospital.

Authorities suspect the driver had been drinking alcohol.

OMAHA, Neb. (AP) — The public campground at Lake Cunningham near Omaha’s airport has been closed after testing showed traces of E. coli in the well water.

The campground was closed Thursday after a water sample tested Wednesday showed the presence of E. coli.

E. coli is a bacterium that can cause bloody diarrhea, dehydration and, in the most severe cases, kidney failure. The very young, the elderly and those with weak immune systems are the most susceptible.

Water samples are taken weekly and tested by the Nebraska Health Department.

Officials say the state will treat the water before the campground can reopen.

Campers using the Lake Cunningham campground will get a refund and have the option to move to the nearby NP Dodge campground.

AUBURN, Neb. (AP) — A southeast Nebraska county is switching to plastic markers for veterans graves in order to thwart thieves.

Crooks have been stealing the standard bronze markers.

Nemaha County veterans service officer Bill Hessler told the county commissioners Wednesday that the new markers will come in two varieties: one for veterans who served during a war and one for veterans who served during peacetime. The bronze markers had designated service during specific wars.

Hessler says families that want to replace bronze markers can buy the plastic markers for $30.

SCHUYLER, Neb. (AP) — Authorities say a teenage girl has died and two other people have been injured in a Schuyler crash.

The accident occurred around 11:15 p.m. Wednesday. Officers briefly chased a car that was being driven erratically but soon halted the pursuit because of safety concerns. Within minutes, they were sent to check a report that the car had rammed a tree.

The 15-year-old girl was found on the ground near the car. Authorities say she was flown to a Lincoln hospital, where she was pronounced dead. The driver was flown to an Omaha hospital for treatment, and a 15-year-old male passenger was taken to a Schuyler hospital.

Authorities suspect the driver had been drinking alcohol.

LINCOLN, Neb. (AP) — A Lincoln man has been given 50 to 80 years in prison for sexually assaulting an unconscious 9-year-old girl and taking photographs.

Online court records say 56-year-old Alan Kosmicki was sentenced Wednesday in Lancaster County District Court. He’d pleaded no contest to attempted sexual assault of a child and visual depiction of sexual conduct. Prosecutors lowered the sexual assault charge in exchange for Kosmicki’s pleas.

Court records say a Seward man who bought the contents of a storage shed found a memory card among the items and then found explicit images of a man and girl on it. He turned it over to police.

Investigators say they determined that the man in the pictures is Kosmicki. He initially told investigators that he wasn’t the man in the pictures.

LAKE BUENA VISTA, Fla. (AP) — A Florida sheriff says charges are unlikely against the parents whose 2-year-old son was killed by an alligator at Walt Disney World.

Orange County Sheriff Jerry Demings tells The Associated Press there was no indication Will and Melissa Graves of suburban Omaha, Nebraska, committed any crime that contributed to the reptile grabbing their son, Lane Graves.

Demings says his department and the state wildlife agency would look into the issue of signs around Seven Seas Lagoon, where Disney had posted “no swimming” signs but no warnings about alligators.

Authorities say the boy waded into no more than 1 or 2 feet of water in the lagoon around nightfall Tuesday when he was taken from a small beach. The boy’s father desperately tried to fight off the gator, but couldn’t save his son.

BELLEVUE, Neb. (AP) — The Air Force has agreed to a $55 million upgrade of the runway at Offutt Air Force Base, a move that will extend the life of the runway for about 20 years.

Nebraska’s congressional delegation welcomed the Air Force’s decision, which was announced Wednesday.

Sen. Deb Fischer says design work will begin this fall and construction will start in 2018.

The decision eases fears that a deteriorating runway could eventually prompt the Air Force to move the 55th Wing to a different base. That would have eliminated thousands of civilian and military jobs in the area.

Because of the crumbling runway, ground crews have had to watch constantly for loose chunks of concrete that could destroy a jet engine if they were sucked inside.