DNA, blood and testimony about a damaged Ford Explorer became key pieces of a case pursued without the recovery of the Nebraska teenager’s body.
SIOUX CITY, Iowa — A white Ford Explorer that investigators connected to missing Nebraska teenager Sunny Sramek became one of the most important pieces of evidence in a federal prosecution that ended with two men receiving a combined 45 years in prison.
Seven years after Sramek disappeared, prosecutors had no recovered body to present to jurors and neither defendant faced a murder count resulting in a conviction. What the government did have was a vehicle containing Sramek’s DNA and blood, testimony describing her condition inside that SUV, evidence of a struggle and witnesses who said Floyd Clifford Coates Jr. later talked about disposing of her body. That evidence formed part of the broader drug, firearms and obstruction case against Coates and Dennis Lawson, who were sentenced in July.
The Explorer had been part of the investigation from its earliest days. The FBI said Sramek, 18, was last seen April 20, 2019, after leaving Trenton, Nebraska, in a white 2004 Ford Explorer. She had told friends and family that she was going on a trip to Omaha. Her mother reported her missing the following day. In a public appeal issued that June, the FBI said there had been no known sighting of Sramek or contact from her after she left Trenton and sought information about where she had gone.
The federal trial years later placed the SUV within a larger methamphetamine-trafficking operation. Prosecutors said Coates was involved in moving pounds of methamphetamine from Colorado to Iowa and other locations for redistribution. During Easter weekend in 2019, according to trial evidence, he arranged another trip to obtain drugs in Kansas City, Missouri. An Iowa woman agreed to travel from Sioux City to Blair, Nebraska, meet Coates and drive him farther south. Coates traveled from Trenton to Blair with Sramek in his wife’s Explorer.
That plan changed after the Iowa driver reached Blair. The woman testified that she saw Sramek motionless in the SUV as she and Coates prepared to leave the area. Prosecutors said Coates told the driver he had provided Sramek with methamphetamine and claimed she had overdosed. The Kansas City trip was called off. Rather than seek to continue the drug run, the evidence showed, Coates instructed the driver to head toward the rural Whiting, Iowa, property of his then-brother-in-law, Dennis Lawson, near the Missouri River.
The driver’s account then became a bridge between the physical evidence in the vehicle and the obstruction charge eventually proved against Lawson. She testified that Coates and Lawson disappeared from her view for a period after the group arrived at Lawson’s property. According to her testimony, Sramek’s body was gone when the men returned. She also said she helped Coates clean the Explorer. Before she left, prosecutors said, Lawson threatened her with the words, “If you talk, it’s your funeral.” Jurors later found Lawson guilty of using a threat to obstruct communication with federal authorities.
Investigators subjected the Explorer to forensic examination. The Justice Department said testing identified Sramek’s DNA and a significant amount of blood inside it. Prosecutors also presented evidence suggesting that she had struggled in the vehicle. At trial, an FBI geologist testified about damage to a window and said the pattern was consistent with three blunt-force impacts from inside, including impacts that could have been made by a foot. A medical examiner addressed the physical reaction described by a witness and testified that such convulsions could be consistent with a fatal methamphetamine overdose.
The forensic evidence did not answer every question about exactly how Sramek died. Prosecutors said Coates himself gave conflicting versions. He told some people that she had overdosed after he supplied her with methamphetamine. Federal officials said he later gave other people a more violent account while maintaining that he had disposed of her body in the Missouri River. Because those accounts differed about the cause and circumstances of her death, the government presented them as statements attributed to Coates rather than as a single uncontested reconstruction of her final moments.
One theme, prosecutors said, remained consistent in Coates’ conversations after Sramek vanished: he believed disposing of her body would make it harder to hold him responsible. Witnesses attributed the phrase “No body, no case” to Coates. Another person said he asked whether someone could be charged with murder if there were no body. Investigators never recovered Sramek’s remains, but federal prosecutors argued that the absence of a body did not erase the forensic evidence, the driver’s testimony or the evidence that objects and information had been concealed.
The resulting indictment and trial therefore focused on federal offenses the government said it could establish beyond a reasonable doubt. After an 11-day trial, jurors convicted Coates on Nov. 25, 2025, of six counts involving a controlled-substance conspiracy, firearms or ammunition and concealment of evidence connected to an official proceeding. He was acquitted of other counts. Lawson was convicted of one obstruction offense based on threatening a witness and was acquitted of additional allegations. The jury deliberated for about two hours before returning the verdicts.
By the time the men returned to court for sentencing, the record allowed Chief U.S. District Judge Leonard T. Strand to address conduct beyond the names of the federal counts. According to prosecutors, Strand found for sentencing purposes that Coates intentionally caused Sramek’s death and covered up the crime. That judicial finding did not amount to a murder conviction by a jury. It did, however, become part of the basis for a 35-year federal sentence imposed on Coates.
Coates was also ordered to serve five years of supervised release after prison. Lawson received 10 years in federal prison and three years of supervised release. There is no parole in the federal prison system. The pair remained in the custody of the U.S. Marshals Service after sentencing while awaiting transfer to federal prisons. Federal officials said their sentences totaled 45 years.
The case drew on far more than the vehicle examination alone. Investigators from numerous agencies worked across state lines, including the FBI, ATF, Nebraska State Patrol, Iowa Division of Criminal Investigation and sheriff’s offices in Nebraska and Iowa. The government said investigators developed enough evidence to call more than four dozen witnesses and introduce dozens of exhibits during the prosecution. Those witnesses helped establish the drug-trafficking background, Sramek’s movements, what was seen at Blair and Lawson’s property, and statements Coates allegedly made afterward.
Yet the Explorer remained one of the few physical places where several strands of the case met. It was the vehicle in which the FBI said Sramek was last seen. It was where the Iowa driver testified she saw her motionless. It was the place where forensic investigators later found biological evidence linked to Sramek and signs prosecutors said pointed to a struggle. And it was the vehicle the driver said she helped clean before she was threatened with silence.
Sramek’s body has still not been recovered. The sentences resolve the federal prosecution of Coates and Lawson on the crimes for which the jury found them guilty, but they do not supply a recovered resting place for Sramek or a jury verdict on a homicide charge. What the case established in federal court was that the absence of a body did not prevent prosecutors from building a criminal case from physical evidence, witness testimony and proven acts of concealment.
Author note: Last updated Aug. 26, 2026.