Under the Portuguese law, criminal offenders that are designated as non-criminal responsible – “inimputáveis”, similar those in the United States of America found “not guilty by reason of insanity”, are forced to be committed to inpatient forensic units either in psychiatric hospitals or prison hospitals for mandatory security measures.

To evaluate if patients committed in a regional forensic inpatient unit (RFIU) who had a psychiatric history preceding the crime, were under long acting injectable antipsychotic (LAIA) in during the period of the crime.

During September/October 2015, patients committed to the RFIU in Centro Hospitalar Psiquiátrico de Lisboa were characterized using medical and court records regarding clinical and demographic variables. The type of crime and previous number of criminal acts were also accounted for.

We included 33 patients in the study. During time of the crime, 25 patients (75.8%) had history of previous psychiatric appointments, with an average of 3 commitments to the psychiatric inpatient units. The majority (n = 17; 68%) had a diagnose of “schizophrenia, schizotypal and delusional disorders” (F20–29; ICD 10) and committed “crimes against life” (n = 13; 52%). They had an average of 0.8 previous criminal acts. During the crime, 7 patients (28%) were taking LAIA. Those, 16% (n = 4) were doing an unknown antipsychotic and 12% (n = 3) were doing Haloperidol.

Despite several studies showing the clinical and rehabilitative benefit of using LAIA early in the disease course, most of the patients in our study, who were already being followed in outpatient psychiatric units, did not benefit from them.

The authors have not supplied their declaration of competing interest.