Christopher Scott Conrad (appellant) appeals from his bench trial conviction for involuntary manslaughter. He contends the evidence was insufficient to prove he acted in a *665 criminally negligent manner. For the reasons that follow, we reverse appellant’s conviction.
I.
FACTS
At about 9:00 a.m. on May 11, 1997, on Gayton Road in Henrico County, appellant fell asleep at the wheel of his automobile and drove off the road, striking and killing Judy Dahlkemper, a jogger. Officer R.J. Smith responded to the scene. Shortly after 11:00 a.m., after examining the physical evidence, Smith took appellant’s statement. Smith described appellant as “extremely tired” and having bloodshot eyes, and he noticed a faint odor of alcohol about appellant’s person. Appellant reported to Smith that he had last slept on May 10, the day before the accident, arising at 11:00 a.m. after six hours of sleep. It was not unusual for appellant to stay up for long periods of time because he had been working an irregular schedule at a retail store and playing in a band. On May 10, appellant worked a shift at the retail store, ran errands, practiced with his band, and went to the home of a friend in Richmond. While at his friend’s home, between about 11:00 p.m. and 1:30 a.m., appellant consumed about fifty ounces of beer. 1 He remained at his friend’s home, awake and watching television, until about 8:45 a.m., at which time he left to return home. Appellant testified that he was not sleepy before he left for home and that it had not occurred to him that he might fall asleep on the drive home.
Appellant traveled about twenty minutes on Interstate 64 to Gaskins Road. As appellant exited Interstate 64, “he really *666 got tired and felt himself going to sleep.” Because he was only about five minutes or four-and-one-half miles from home, “he did not really want to stop.” He reported to Officer Smith that “he ran off the road only after dozing off for a half second, caught himself drifting four or five times, still nodding, but said he would catch himself and said [he] would snap out of it.” On Gayton Road, a little over one-half mile from his home, he fell asleep and heard a loud noise. He initially thought someone had hit his car with a bottle, but then he saw the body and stopped his vehicle.
Another driver on the road, Mary Elizabeth Harris, testified that she had been behind appellant, who was traveling at the forty-five mile-per-hour speed limit, for approximately two-tenths of a mile before she saw his car veer right into a turn lane and strike the jogger, who had been running, facing traffic, on the edge of the turn lane near the adjacent grass. Appellant’s vehicle displayed no turn indicator and did not brake prior to impact. Officer Smith determined that the jogger had been eighteen inches from the edge of the pavement when she was struck, and he confirmed that appellant had not applied his brakes prior to impact.
Appellant testified at trial, giving substantially the same version of events he had given to Officer Smith at the scene. He testified that when he turned onto Gayton Road, he began to yawn, was “incredibly close to dozing off,” and “was starting to kind of drift ... in the road.” However, he “[did not] recall” telling Officer Smith that he had caught himself about to doze off on four to five occasions prior to the accident and said he believed that he told Officer Smith he had done so only one or two times. He also said he had not gone off the road prior to the accident but had “com[e] [within] about ... an inch [of] the line.”
In finding appellant guilty of involuntary manslaughter, the trial court found that appellant had been awake for twenty-two hours and “felt himself just about going to sleep,” allowing “his car ... [to] drift[ ] over to the right ... on four or five different occasions” as he was “nodding in and out.” Although *667 appellant had “previously dozed prior to the accident,” observed the court, “he chose to continue to drive to try to make it home.” The trial court concluded that “[appellant] was operating that motor vehicle in a state that he knew very well or should have known very well that he may, in fact, fall asleep” and that his conduct was “gross, wanton, and culpable, [and] showed a disregard for human life.”
II.
ANALYSIS
When considering the sufficiency of the evidence on appeal in a criminal case, we view the evidence in the light most favorable to the Commonwealth, granting to it all reasonable inferences fairly deducible therefrom.
See Higginbotham v. Commonwealth,
The weight which should be given to evidence and whether the testimony of a witness is credible are questions which the fact finder must decide. However, whether a criminal conviction is supported by evidence sufficient to prove guilt beyond a reasonable doubt is not a question of fact but one of law.
Bridgeman v. Commonwealth,
“Involuntary manslaughter in the operation of a motor vehicle is defined as an ‘accidental killing which, although unintended, is the proximate result of negligence so gross, wanton, and culpable as to show a reckless disregard of human life.’ ”
Keech v. Commonwealth,
“ ‘The law recognizes three degrees of negligence, (1) ordinary or simple, (2) gross, and (3) willful, wanton and reckless.’”
Tubman,
“Anyone who falls asleep while operating an automobile on a public road is guilty of a degree of negligence exceeding lack of ordinary care,” and such behavior may be “sufficient to find the operator guilty of the offense of reckless driving.”
Kennedy v. Commonwealth,
Although we have not yet had occasion to consider an involuntary manslaughter case identical to appellant’s, our holding in
Hargrove v. Commonwealth,
The evidence does not exclude the reasonable hypothesis that, although Hargrove had worked all night, he had not fallen asleep, had not previously dozed during the trip before the accident, and, although tired and in need of sleep and having only a short distance or a trip of a few minutes to reach his home, he could reasonably have believed that he could negotiate his vehicle a short distance without endangering human life.
Id.
We intimated in Hargrove that a driver’s “[having] previously dozed during the trip before the accident” might be sufficient to put a driver on notice that it was not improbable that he would fall asleep again, causing injury to another, before reaching his destination. Id. However, we did not purport to hold in Hargrove that such circumstances mandated the conclusion that the driver committed involuntary manslaughter. Even if we had attempted such a holding in Hargrove, it would have been dicta, for no evidence indicated that Hargrove, in *671 fact, had previously fallen asleep during his travel from work to home. It indicated only that Hargrove knew he was sleepy before leaving for home, which we found insufficient to prove the criminal negligence necessary to support an involuntary manslaughter conviction. 3
We are unaware of any Virginia decision requiring a holding that one who previously has fallen asleep while driving and who subsequently, dining that same trip, falls asleep causing injury is guilty of involuntary manslaughter as a matter of law.
Cf Newell,
Here, unlike in Hargrove, the record contains detailed information regarding the distance appellant attempted to drive after becoming sleepy. Appellant reported to Officer Smith that when he exited Interstate 64 onto Gaskins Road, only about five minutes or four-and-one-half miles from his home, “he got really tired and felt himself going to sleep.” On one *672 occasion, “he ran off the road ... after dozing off for [only] a half second.” Subsequently, he “caught himself drifting four or five times,” but he was able to “catch himself and ... snap out of it” on each occasion. Thereafter, for at least two-tenths of a mile before leaving the road and striking the jogger, appellant maintained the speed limit and engaged in no weaving or other erratic driving.
Appellant testified that he was not sleepy before he left his friend’s home. Although the trial court was entitled to reject appellant’s testimony as incredible and to conclude that appellant was lying,
see Speight v. Commonwealth,
For these reasons, we reverse appellant’s conviction.
Reversed.
Notes
. When Officer Smith first asked appellant whether he had consumed any alcohol, appellant said he had not. When Officer Smith asked appellant for consent to test his blood for alcohol, appellant admitted his alcohol consumption. A blood test performed “a little after noon” on May 11 was negative for drugs or alcohol. During argument, the trial court commented, "[T]here’s no evidence that his drinking ... was the cause of [the accident]," and the court made no mention of appellant’s drinking in finding him guilty.
. We observed that "operating [one's] vehicle for a number of hours in a tired and sleepy condition” or undertaking a trip of "substantial distance or time” while in such a state might support such a conviction, but no evidence in the record proved that Hargrove did either of these things.
Hargrove,
. In
Hargrove,
we discussed our holding in
Kennedy,
