ABSTRACT
In the first part of this work, we examined the impact of using a dump or slice style entry on officer performance. We found that, compared to the slice conditions, officers took approximately twice as long to respond to a second gunman in the dump conditions. Once the officers in the dump conditions detected the second gunman in the room, they were almost 5 times more likely to violate the universal firearms safety rules and commit a priority of fire violation. The first officer also momentarily stalled in the doorway during 18% of the dump entries but never stalled during a slice entry. We did observe more instances of the officers in the slice entry shooting at the innocent suspect in the room, but this difference was not large enough to be confident that it was not the product of chance assignment error. Taken together, we argued that the data suggested that the slice was a better entry style than the dump to teach patrol officers.
