A police officer is at a crime scene and locates a footprint in a flowerbed near an open window. The window is examined closely and pry marks are discovered on the lower window sash and the window sill indicating forced entry. The police officer pointed out the evidence to the investigator who photographed the evidence and collected the footwear impression using a liquid footwear casting system. Who is required to testify in court to get the evidence admitted during the trial?

The police officer

Explanation:

The police officer was the one who spotted the evidence and notified the investigator ,he is the key witness in the investigation. The investigator will present the evidence and the validity of the evidence will be questioned and the only witness to the validity of the evidence is the police officer.

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.

sir frederic attributed inaccuracies to schemas. memory reconstruction is one part actual events and one part personal schema, which can result in inaccuracies when memories are reconstructed.