United States v. Rodney Leroy Brown

Court of Appeals for the Eleventh Circuit·Decided September 9, 2026·No. 24-10289·Published

Opinion

FOR PUBLICATION

In the

United States Court of Appeals For the Eleventh Circuit

No. 24-10289

UNITED STATES OF AMERICA, Plaintiff-Appellee,

versus

RODNEY LEROY BROWN, Defendant-Appellant.

Appeal from the United States District Court for the Southern District of Florida D.C. Docket No. 0:23-cr-60101-KMM-1

Before NEWSOM, LAGOA, and KIDD, Circuit Judges. KIDD, Circuit Judge:

Rodney Brown appeals his convictions for Hobbs Act robbery and brandishing a firearm in furtherance of a crime of violence , and his sentence of 324 months of imprisonment. He makes two arguments for the first time on appeal: First, the district court

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violated his Confrontation Clause rights by allowing a lab analyst to testify at trial, even though the analyst did not conduct or observe the underlying lab testing or write the relevant lab report. Second, the district court violated the Ex Post Facto Clause by using a later version of the U.S. Sentencing Commission Guidelines Manual than the one in place at the time his offense occurred, resulting in a higher guidelines range.

Because Brown raises these issues for the first time on appeal , we are limited to reviewing the district court’s decisions only for plain error. We find that the district court did not commit plain error by allowing the lab analyst to testify. So we affirm his convictions . But we agree with both Brown and the government that the district court plainly erred by using the wrong version of the Guidelines Manual. As a result, we vacate his sentence and remand this case for resentencing.

I. BACKGROUND

A grand jury indicted Rodney Brown on one count of Hobbs Act robbery, in violation of 18 U.S.C. § 1951(a), and one count of brandishing a firearm in furtherance of a crime of violence, in violation of 18 U.S.C. § 924(c)(1)(A)(ii).

At trial, a cashier at a convenience store testified about a robbery she witnessed. That day, a robber entered the store and went to one of the drink coolers to get a bottle of soda. He then approached and entered the register area with a gun in one hand and another in his waistband. He demanded that the cashier open the register and give him money, and he threatened to shoot her

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nearby five-year-old son if she did not comply. The cashier opened the registers, and the robber put the money, which included a large number of coins, in a bag, took her purse, and left the store. He left the soda bottle that he had taken from the drink cooler on the counter . She testified that the robber was wearing all black, a hoodie, and a face mask covering the bottom half of his face, but she did not get a good look at him. Video surveillance from the store corroborated her testimony. She was unable to identify the robber in a photo array.

Detective Shaun Halleran of the Broward County Sheriff’s Office testified that he responded to the robbery at the convenience store, and he reviewed both interior and exterior video footage from the store. Exterior video footage showed an individual wearing a black hoodie, black pants, and white shirt standing on the sidewalk outside the store for some time. This same individual threw a bottle by the dumpster in the parking lot and then entered the store. A few minutes later, this same individual exited the store and entered an alley behind the store. Video footage from a neighboring business that the same individual entered shortly before the robbery captured an image of the individual’s face without a mask.

At an apartment complex a short distance from the store, officers found a black mask and a roll of coins consistent with those taken from the store. Officers also recovered the bottle the person discarded outside the store. They swabbed both the bottle and the black mask for DNA testing. Detective Halleran acknowledged that Brown’s fingerprints were not found on any of the areas they

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checked for fingerprints inside the store or on the soda bottle left on the counter. Detective Halleran testified that a state crime lab’s DNA report showed two contributors on both the soda bottle recovered outside the store and the mask, though this report was not admitted into evidence.

During the investigation, law enforcement also obtained Brown’s DNA and sent it to DNA Labs International (“DLI”) for testing so that it could be compared to the DNA swabs obtained from the soda bottle and the mask. Daniel Aguilar, a senior DNA analyst from DLI and an expert in forensic DNA examination, testified that in his role as an analyst at DLI, he obtains DNA profiles generated from the evidence by DLI’s lab, he examines those profiles and makes comparisons, and he then reports his findings. Although Aguilar was trained to conduct the lab testing of evidence, in his current role as an analyst, Aguilar was “not doing the hands- on laboratory work” examining the physical evidence himself. Rather , Aguilar explained that other persons in the lab examine the physical evidence and test the evidence for DNA. The resulting DNA profiles are then sent to the analysts for analysis and comparison .

Aguilar then testified to the general protocol and procedures DLI typically follows for testing evidence for DNA in the lab. Because a central argument in this appeal concerns his testimony, we will quote the relevant portions directly:

So what generally happens is that the evidence will get checked into a locker, a secure vault actually,

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when we receive it, and then the serologist or screener will remove that when the time comes, and they will go ahead and cut, in this case, swabs that were received. They will cut portions of those swabs into small tubes that are maybe like an inch or two long. And then we take it to the four main laboratory processes.

So those four steps are extraction, which is when we expose those swabs or the sample to solutions that break open the cells and release the DNA and purify that DNA.

The next step is quantitation, which is where we, as the name implies, we find out exactly how much DNA is in that extract that we’ve created.

The third step is amplification. Amplification involves—it’s sort of like a biological Xerox copier where we start with, say, two copies of DNA. And then after one cycle, we have 4 copies of DNA and then we have 8 copies and 16 copies and 32 copies. With every round it doubles. So after a few rounds, we actually end up with millions and millions of copies when we only started with a few to begin with. And when we do that, we tag specific areas of it with colored dye so that we can see them later.

The fourth step that we then take it through is we take that amplified DNA and we put it through an instrument that allows us to see the DNA profile as a series of peaks. So if you imagine sort of like a heart

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monitor where there’s a baseline, and then when your heart beats, there’s a peak. So several of those pe[a]ks will appear wherever DNA is present, and those peaks are assigned numbers and those numbers become the DNA profile.

Turning to the analyst’s tasks, Aguilar stated that the forensic examination performed by the analysts at DLI were all “peerreviewed .” He explained that, generally, under this peer-review process, the first analyst, known as “the writer[,] will get that data that has been generated in the laboratory and they will make their determinations and comparisons and they will then author the report .”

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United States v. Rodney Leroy Brown, (11th Cir. 2026).

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