Criminal Defence for Medical Negligence with Fatal Outcome

The death of a patient as a consequence of a healthcare professional's action activates the criminal route when serious or less serious professional negligence concurs. Defence of the physician under investigation and private prosecution of the family require specialist medico-legal expert evidence, knowledge of Supreme Court doctrine on lex artis and capacity to articulate comprehensive compensation when appropriate.

Applicable Criminal Types

The criminal channel for death by healthcare error is homicide by negligence, with two levels of seriousness. Homicide by serious negligence (Art. 142.1 CP) is punished with imprisonment of 1 to 4 years and special disqualification from practising the profession for 3 to 6 years. Homicide by less serious negligence (Art. 142 bis CP) is sanctioned with a fine and disqualification, and is only prosecutable through the victim's complaint. The difference between the two is not a nuance: it determines whether or not there is a prison sentence and whether the procedure can even begin ex officio. This is why the first task, both in defence and in prosecution, is to situate the fact at the correct level of negligence.

Serious vs. Less Serious Negligence

Serious negligence (Art. 142.1 CP) requires breach of basic professional care rules: operating on the wrong limb, not detecting an evident pathology with the tests performed, prescribing a medication with fatal interaction despite documented allergy. Less serious negligence (Art. 142 bis CP, introduced by LO 1/2015 and reformed in 2019) covers relevant but not gross carelessness and requires victim's complaint. The frontier is complex and depends on expert evidence: what for one expert is a gross deviation from the standard may, for another, be an excusable error within the margin of uncertainty proper to medicine.

Determining Medico-Legal Expert Evidence

The procedure is won or lost on medico-legal expert evidence. Defence and prosecution must submit qualified experts —specialists in the specific field (cardiologist, neurosurgeon, gynecologist) with judicial experience— establishing: (1) the lex artis ad hoc applicable to the specific case; (2) whether the professional's action deviated from it or not; (3) the causal nexus between action and death; (4) whether the result was foreseeable and avoidable with due diligence. The chronological reconstruction of the care pathway —what was decided, when and why— is the material on which the expert works, which is why securing it documentarily is a priority.

Compensation Quantification

Death compensation is indicatively quantified through the traffic compensation scale (Law 35/2015), but the Supreme Court admits and usually exceeds that minimum when particular circumstances concur: age of the deceased, economic dependents, qualified moral damage, documented loss of medical opportunity. Subsidiary civil liability of the healthcare center (Art. 120.4 CP) guarantees effective payment in most cases, and where organizational failures concur —protocols, staffing, supervision— the center may also respond directly.

Defensive and Prosecutory Strategy

The strategy is built as a mirror image. In defence of the professional, the axes are the documentation of the lex artis (establishing that the action conformed to the applicable protocols) and the concurrence of causes: demonstrating that the outcome was due in significant part to the patient's own pathology and not only to the medical action. In prosecution of the family, the key piece is usually the loss of opportunity: when the correct action would not have saved the patient with certainty, but would have significantly increased their chances. In cases of clear liability, acknowledgment, apology and reparation may activate a highly qualified mitigating factor and redirect the conflict. Disqualification is an automatic accessory penalty on conviction under Art. 142 CP, so avoiding it, in defence, runs through acquittal or, subsidiarily, through adjusting its duration.