Relating to the admissibility of evidence of extraneous offenses or acts in the prosecution of certain family violence offenses.

HB 3603 allows prosecutors to present evidence of a defendant’s past incidents against the same victim in specific family violence cases (where the victim is a spouse, parent, or similar family member under Texas Family Code). This overrides standard evidence rules that typically exclude such past conduct. However, judges must first confirm the evidence meets reasonable doubt standards, hold a separate hearing without the jury, and prosecutors must notify defendants 30 days before trial. The law applies to cases starting on or after September 1, 2025.