An excerpt from Burl Barer:
The effect of alcohol on the fetal brain is such that this region does not develop sufficiently to allow the FAS individual to appropriately control his or her actions. As such, FAS patients tend to be impulsive, uninhibited, and fearless. They often display poor judgment and are easily distracted. Difficulties in perceiving social cues and a lack of sensitivity often cause interpersonal problems. FAS patients have difficulties linking events with their resulting consequences. These consequences include both the physical, e.g. getting burned by a hot stove, and the punitive, e.g. being sent to jail for committing a crime. Because of this, it is difficult for these individuals to learn from their mistakes.
Lacking sufficient cognizance of the threat or fear of consequences, the FAS patient is less likely to control his or her impulsive behavior. Similarly, FAS individuals have trouble comprehending that their behavior can affect others. As such, they are unlikely to show true remorse or to take responsibility for their actions. These are the very attributes that can lead to crime, "They are very impulsive and do things that are not well thought out, and they get into significant difficulty from that. The malicious intent is seldom there. I find they're exploited by more talented criminals to do some of the running, if you like, and they're more likely to get caught."