State Of Washington, V. Claudio Green-hernandez

Court of Appeals of Washington·Decided July 20, 2026·No. 87447-1·Unpublished

Opinion

IN THE COURT OF APPEALS OF THE STATE OF WASHINGTON

THE STATE OF WASHINGTON, No. 87447-1-I

Respondent, DIVISION ONE

v. UNPUBLISHED OPINION CLAUDIO E. GREEN-HERNANDEZ,

Appellant.

SMITH, J. — The State charged Claudio Green-Hernandez with felony

driving under the influence (DUI), violation of ignition interlock, driving while

license suspended/revoked in the first degree, and reckless driving. The

defense’s expert witness testified that Green-Hernandez’s symptoms may have

stemmed from his diabetes, and the symptoms could have affected Green-

Hernandez’s driving and performance in the field sobriety tests. The jury found

Green-Hernandez guilty on all counts. Green-Hernandez appeals, asserting

prosecutorial misconduct and ineffective assistance of counsel. Finding no error,

we affirm.

FACTS

Background

In December 2023, Trooper Padilla observed Green-Hernandez driving 20

miles per hour over the speed limit on Interstate 90. Padilla initiated a traffic

stop, during which he observed an open container in the center console, Green- No. 87447-1-I/2

Hernandez’s eyes were bloodshot and watery, and he smelled an odor of

intoxicants on Green-Hernandez’s breath. Padilla asked Green-Hernandez if

“anything prevent[ed] him from walking in a straight line or bouncing on one foot.”

Green-Hernandez informed Padilla that he had diabetes and high blood sugar.

Padilla conducted three voluntary field sobriety tests. Padilla observed four out

of six clues in the horizontal gaze nystagmus (HGN) test; four out of eight clues

in the walk-and-turn test; and three out of four clues on the one-leg-stand test.

Green-Hernandez was later charged with felony DUI, violation of ignition

interlock, driving while license suspended/revoked in the first degree, and

reckless driving.

Expert Witness Testimony

Green-Hernandez’s trial began in July 2024. During direct examination,

Dr. Nicole Chicoine,1 the defense’s expert witness, testified that she is a medical

legal consultant. Pertaining to Green-Hernandez’s case, Dr. Chicoine testified

that she reviewed his King County jail medical records, Harborview emergency

department medical records, and police videos. Dr. Chicoine did not physically

examine Green-Hernandez.

In reviewing Green-Hernandez’s medical records, Dr. Chicoine testified

that his blood sugar levels were 436 and 427, which she classified as a “pretty

high level.” Dr. Chicoine also testified that Green-Hernandez had endorsed

1 Dr. Chicoine’s primary job is an emergency medicine physician and clinical instructor at the University of Washington Department of Emergency Medicine. She testified that she treats patients with diabetes frequently, and it was common for her to treat patients with high blood sugar.

2 No. 87447-1-I/3

concerns for polyneuropathy, or damage to his nerves.2 Symptoms of

neuropathy include numbness, tingling, and pain. Dr. Chicoine explained that

these symptoms can impact a person’s feeling or movement in their hands and

feet, the nerve damage may cause a person “not feel that they’re actually on the

ground or something soft or something hard.” Dr. Chicoine detailed that

diabetics with bad polyneuropathy have difficulties with balances and

coordination. Based on her medical expertise, Dr. Chicoine testified that

neuropathy can affect a person’s ability to perform the walk-and-turn test and the

one-leg-stand field sobriety tests.3

Additionally, Dr. Chicoine testified that hyperglycemia4 can negatively

affect a person’s attention to detail, memory, and ability to perform other

cognitive tasks. Dr. Chicoine concluded that it was possible that hyperglycemia

affected Green-Hernandez’s cognitive abilities while he was driving and

completing the field sobriety tests. Furthermore, if a person’s blood sugar gets

high enough, Dr. Chicoine stated, that they can experience diabetic ketoacidosis

(DKA).5 DKA symptoms include dehydration, vomiting, altered mental status,

2 Dr. Chicoine further explained that “when someone with diabetes has uncontrolled glucose over [a] extended [] period of time, you can have damage throughout your whole body.” Dr. Chicoine testified that neuropathy can be caused by diabetes. 3 Dr. Chicoine testified, “[i]f you don’t have the ability to feel, it’s

sometimes difficult for you to understand where your body is in relation to your environment, and it can affect your balance, it can affect your coordination. And if your motor neurons are affected, it also can cause weakness, which, in turn, can also cause instability and lack of coordination.” 4 Hyperglycemia is high glucose levels.

5 Diabetic ketoacidosis is diagnosed by a high glucose level, acid in one’s

blood, and presence of ketones.

3 No. 87447-1-I/4

and potentially losing consciousness. Although the hospital did not conduct a

test for DKA, Dr. Chicoine noted that Green-Hernandez experienced two out of

the three symptoms.6 Dr. Chicoine determined that it was possible that Green-

Hernandez experienced DKA. Ultimately, in reviewing Green-Hernandez’s

medical records and other evidence, Dr. Chicoine concluded that Green-

Hernandez’s hyperglycemia, retinopathy,7 and polyneuropathy may have

affected his performance in driving and field sobriety tests.

On cross-examination, the prosecutor asked Dr. Chicoine if she was being

paid $500 for her testimony, and she replied, yes. The prosecutor then asked if

alcohol could cause an altered mental state, Dr. Chicoine answered, yes. The

prosecutor asked if alcohol could cause neuropathy and Dr. Chicoine stated, “I

presume like extensive alcohol usage.” Later, the prosecutor asked

Dr. Chicoine, “you would agree that all the clues that were seen on the walk-and-

turn and the one-leg stand, those are all consistent for alcohol impairment as

well, correct?” Dr. Chicoine replied, yes.

6 The three markers of DKA are high blood sugar, presence of ketones, and blood pH. Green-Hernandez exhibited high blood sugar and presence of ketones. His blood pH was unknown. 7 Retinopathy is any of various noninflammatory disorders of the retina

including some that cause blindness. Merriam-Webster, https://www.merriam- webster.com/dictionary/retinopathy (last visited June 24, 2026). Dr. Chicoine testified that Green-Hernandez experienced blurry vision at the hospital.

4 No. 87447-1-I/5

Prosecutor’s Closing and Rebuttal Closing Argument

In his closing argument, the prosecutor stated that he would talk about

“the law and how it applies to the facts of this case.” The prosecutor then

explained the burden of proof, is beyond a reasonable doubt. ... It is a doubt that would exist in the mind of a reasonable person. It is based upon the evidence or the lack of evidence in this case. It is not speculative or made-up doubt. It’s based on something that you would have seen or heard in court.

The prosecutor went on to describe certain evidence, As to what would be an unreasonable doubt in this case, it would be that the Defendant’s diabetes caused the signs of alcohol impairment that were observed. Dr. Chicoine concluded that the Defendant had neuropathy. That was based upon a note in his medical records that he had decreased sensation to light touch in his toes on December 27[th]. And, therefore, she concluded that he would not be able to properly do the walk-and-turn and one-leg stand of the field sobriety tests. This is an unreasonable doubt in light of all the medical records.

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