A qualitative study of 26 individuals with brain injury histories experiencing homelessness, published in Brain Injury (observational design, small purposive sample, no reported conflicts), reveals that TBI, stroke, or alcohol-related brain damage typically precedes housing loss rather than resulting from street life. This aligns with patterns in a 2019 systematic review in The Lancet Public Health (observational synthesis of 38 studies, n>10,000 homeless participants across high-income countries) showing 50%+ lifetime TBI prevalence, far exceeding general population rates, with cognitive sequelae like impaired executive function and emotional dysregulation eroding employment and relationships. The UdeM team's literature review in Annals of Physical and Rehabilitation Medicine further exposes systemic failures: missed detection points in youth services and corrections, plus siloed care that delivers only episodic treatment. An earlier Disability and Rehabilitation study (qualitative professional interviews, n= unspecified Quebec sample) confirms community agencies lack TBI expertise, amplifying vulnerability amid shorter rehab stays and aging-related non-traumatic injuries. Mainstream coverage overlooks this causal pathway, where even subtle post-injury deficits compound with crumbling support networks into a 'perfect storm' of preventable homelessness; coordinated, cross-sector screening could interrupt it before trajectories solidify.