Alexithymia was not associated with childhood trauma exposure (β = 0.076, p = .509), police work-related trauma exposure (β = −0.107, p = .355), oxytocin levels (β = −0.164, p = .161), insula (β = −0.170, p = .158) or amygdala (β = −0.175, p = .135) reactivity, or amygdala volume (β = 0.146, p = .209). This evidence concerns the gene OXT and alexithymia.