¶ 1 Richard Downing appeals from the judgment of sentence entered following his conviction for driving under the influence (DUI). We affirm.
¶ 2 On August 20, 1995, Pennsylvania State Police Trooper John Angelo was dispatched to Herman Road in Butler County, where a motorist allegedly struck a pedestrian. He arrived and discovered appellant was the driver. Upon noticing appellant had an odor of alcohol on his breath and staggered when he walked, Trooper Angelo administered three field sobriety tests. Appellant did poorly on all three evaluations and was placed under arrest.
¶ 3 Appellant was transported to the State Police barracks. One hour and seventeen minutes after the accident, he was given a breathalyzer test which revealed his blood alcohol content (BAC) was 0.145%. Appellant waived his Miranda 1 rights and admitted he was intoxicated, having been at several bars earlier in the evening drinking beer.
¶ 4 On October 16, 1995, appellant was charged with DUI pursuant to 75 Pa.C.S. Sections 3731(a)(1) and (a)(4). 2 A jury found him guilty as charged; he was sentenced, and this appeal follows.
¶ 5 Appellant first argues the trial court should not have permitted evidence of his BAC to support the charge under Section 3731(a)(4) because the Commonwealth did not present expert “relation-back” testimony; 3 without such testimony, he maintains, the Commonwealth could not have proven beyond a reasonable doubt he had a BAC of 0.10% or greater at the time he was driving. Appellant’s claim calls upon this Court to once again sift through the paradoxical volume of law regarding retrograde extrapolation as it pertains to our DUI statute.
¶ 6 In
Commonwealth v. Jarman,
In cases where test results show levels of alcohol significantly above 0.10% and where blood samples have been obtained soon after suspects have been stopped, there is a very strong inference that blood alcohol levels were in the prohibited range while driving. However, ... where the blood alcohol test result barely exceeded the 0.10% level and the lapse of time between driving and the taking of the blood sample was not insignificant, the inference is weakened.
¶ 7 The Supreme Court recognized the two factors involved: time and test result. However, the Court did not specifically indicate what combination of BAC levels and time lapse would obviate the need for expert relation-back evidence. As a result, courts thereafter struggled with the question of when a BAC is “significantly” above 0.10%, and when testing is “soon after suspects have been stopped” for purposes of determining whether the Commonwealth must present expert relation-back testimony. 4 In Osborne, a panel of this Court summarized the practical problems arising from the application of the Jarman and Modaffare holdings:
[T]he supreme court did not draw a bright numerical fine between what it would consider to be a minimal upward departure suggesting a weak inference of guilt and what would constitute a significant upward deviation which would give rise to a strong inference of guilt. In like vein, the supreme court failed to establish a temporal cut-off for the drawing of a suspect’s blood to indicate either a weak or a strong inference of guilt.
Osborne, at 531.
¶ 8 In
Commonwealth v. Yarger,
once the Commonwealth has established that the driver’s blood alcohol content reflects an amount above 0.10%, the Commonwealth has made a prima facie case under 75 Pa.C.S. § 3731(a)(4). At this point, the defendant is permitted to introduce expert testimony to rebut the Commonwealth’s prima facie evidence. If the defendant decides to rebut the prima facie evidence against him with expert testimony, then the Commonwealth may present its own expert to refute this testimony.
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[W]e find it unnecessary to require the Commonwealth to present expert testimony in cases where the driver has failed to rebut the Commonwealth’s pri-ma facie evidence that his blood alcohol content was 0.10% while operating a motor vehicle.
Yarger, at 531-32 (footnote omitted). Although the Court repeatedly stressed this point, it found Yarger’s BAC level of 0.18% to have been “significantly” above the legal limit, and the time period of forty minutes not to have been lengthy. Id., at 531. The Court then explained no relation-back testimony was required, and affirmed the conviction. 5
¶ 10 Appellant’s BAC, taken seventy-seven minutes after the driving, was 0.145%. This was 45% over the legal limit, 6 and the time lapse was not lengthy. As the evidence demonstrated a prima facie case appellant’s BAC was above 0.10% while he was driving, it was not necessary for the Commonwealth to present expert retrograde extrapolation evidence during its case-in-chief. Compare Allbeck, supra (0.151% BAC taken ninety minutes after driving demonstrated prima facie case and exempted Commonwealth from presenting expert relation-back testimony). Because appellant did not present any retrograde extrapolation evidence that may have rebutted the Commonwealth’s prima facie case, his conviction under Section 3731(a)(4) was proper. 7
¶ 12 To convict under Section 3731(a)(1), the Commonwealth must prove the appellant was the operator of a motor vehicle, while he was under the influence of alcohol to a degree that rendered him incapable of safe driving. 75 Pa.C.S. § 3731(a)(1);
Commonwealth v. Kelley,
¶ 13 The Commonwealth clearly demonstrated a violation of Section 3731(a)(1). Immediately following the accident, Trooper Angelo noticed appellant was staggering and had alcohol on his breath.
See Commonwealth v. Yedinak,
¶ 14 Based on the foregoing, we affirm the judgment of sentence entered by the trial court.
¶ 15 Judgment of sentence affirmed.
Notes
.
Miranda v. Arizona,
. Also charged with violating 75 Pa.C.S. § 3731(a)(5), he was not prosecuted under this Section because it was held unconstitutional by the Supreme Court in
Commonwealth v. Barud,
. Relation-back, or retrograde extrapolation, has been defined as the process of inferentially projecting data into an unknown area to achieve a conjectural knowledge of the unknown. See Robert J. Schefter, Under the Influence of Alcohol Three Hours After Driving: The Constitutionality of the (A)(5) Amendment to Pennsylvania’s DUI Statute. Rephrased in English, retrograde extrapolation means several factors are applied to the test results to arrive at an educated estimate of BAC at the time of driving.
.
See, e.g., Commonwealth v. Loeper,
. The
Yarger
decision has also caused confusion. Its language "arguably ... desired to relieve the Commonwealth from presenting expert relation back testimony in all DUI
. We recognize some cases have referred to BAC levels of 0.14% as "slightly” above the legal limit, an adjective wé can only ascribe to the misconception of thinking of 0.14% as inherently a very slight number. We can think of no context short of selling used cars where a 40% deviation is "slightly” over the line. For example, a speeder in a 65 m.p.h. zone, 40% over the limit, is going 91 m.p.h. An election margin of 40% is nothing short of a landslide. Who would call a tax increase of 40% a "slight” increase? Simply put, a BAC of 0.108% may be deemed "slightly” over the limit; a BAC of 0.145% is not.
. Appellant argues we should follow
Osborne,
and
Commonwealth v. Shade,
