plz help me homework problem?

Question

In what ways do police officers and detectives use science to solve crimes? i already got Fingerprints footprints and dna just give me 5 senteces about them i got so much to do


thank u 4 ur help

Answer 1

1. Bullet trajectories, re-enactments. Sometimes the research on guns, ballistics and bullet wounds can determine the difference between whether suicide/murder was possible or impossible. Matching shells, casings, etc. to guns or bullets owned or purchased by someone. Traces of gun powder on clothing or hands.

2. tracing the source of fires to find the cause, if it were accidental or arson, or what chemicals were involved and if they were brought to the scene and deliberately poured, etc.

3. matching hairs and fibres to remnants found on the scene
(sometimes requires microscopic examination, or chemical analysis to prove a match). finding traces of blood, semen, skin cells under finger nails, etc. can be used to determine a match.

4. matching tire treads, shoe prints or other imprints
(one victim had the dust from a license plate imprinted on the clothing because of the high impact of the hit and run driver)

5. voice recognition or handwriting analysis, matching the recording of a voice or the writing in a note to a person

6. proving the time or cause of death in order to match it to a consistent theory or prove a theory is not possible (note: the length of time can require analysis of decomposition, the stomach contents and level of digestion). Autopsies can reveal hand or pressure marks on the neck, whether there was enough blunt force/trauma to the head to cause death, whether broken bones are consistent with a fall or with abuse, etc. Blood analysis can reveal the presence or level of toxins, such as poison or alcohol or other drugs or chemicals, and determine whether someone was intoxicated or the signs of poisoning to cause death immediately, by injection or by ingestion, or over a long period of time.

7. I don't know if this counts as science, but using digital technology to record video surveillance is becoming more common. That is probably NOT what the question is asking for, but it is technically a form of advanced science that we have today. Using chemicals that mark money or mark people with stains in order to aid in tracing. Again, that is a more external application of chemistry and may not count as science, but is the result of lab research and development.

8. Use of polygraph or psychological analysis to detect if a person is lying. This is not reliable as legal evidence in court, but is often used to compel confessions, so it affects cases. Comparing research and data on killer or offender profiles to understand patterns and predict behavior so that cases can be better investigated and resolved.

Answer 2

They go on their comps and find suspects and they research about them. They talk to witnesses to find out what happened. They also go to the scenes to investigate the crime. They use chemicals to uncover the fingerprints. The last thing I can think of is they would get the suspects alibies and figure out if where they were was possible.

Hope i helped!

Answer 3

get the x with the x and numbers with numbers: you convey over the 2x yet make it unfavorable: 4x - 2x = 2x then flow the -3 over to the -a million yet make the -3, +3 -a million + 3 = 2 2x=2 divide 2 from 2x and then divide 2 with the aid of two and you get... x = a million