The unit, a merger between police and fire, was created after two on-duty firefighter deaths.
Colleen Stamper, 19, and Santiago Rease, 20, were fatally shot in the 2800 block of North Erie Street.
Aayla Johnson, 1, was pronounced deceased at Mercy Health St. Vincent Medical Center.
Scenario-based exercises help candidates with handling real-life situations.
Investigators believe the woman had been deceased for approximately a month.
The trial continues Wednesday for Breydon Ferrell. Prosecutors anticipate it to last seven to eight days.