Complex sentence: Additionally, Wiese states that his vision of hell occurred at 3:23AM, however since he was asleep at the time-Wiese offers no proof of the vision being anything other than a bad dream.
Split into simpler sentences: Additionally, Wiese states that his vision of hell occurred at 3:23AM. However, since he was asleep at the time, there is no proof of the vision being anything other than a bad dream.