Answer:
Low levels of brain serotonin neurotransmission have been found in impulsive murderers and arsonists
Step-by-step explanation:
Serotonin is seen as playing a role in the inhibition of impulses other than aggressive ones. The regulation of emotions is relevant to both violence and impulse control. Strong emotional states often accompany violent acts that are considered impulsive.
Irritability, temper outbursts, or a greater emotional responsiveness to others are often present in violent or impulsive individuals. Many of these individuals have general problems with emotional self-regulation.