Thank you very much. Here are some more sentences I'm not sure of.
1) DNA can’t be changed since each (every also possible) person/each of us/ has a different DNA (?).
2) Using (by using) this method forensic artists can convict thousands of criminals even after many years from the crime.
3) He had a forked beard and a short moustache. When he pushed past me, I saw his dirty hands with horrible brown nails.
4) A new robot has been developed, which is moved by thought. So, it is useful with people with disabilities.
They can check a suspect’s fingerprints or his/her blood type.
5) They can also check his/her (?) teeth or look at his/her dental record.
They have to do good (?) interviews. They need to possess good interview skills to get information from the witnesses.
6) They should/are required to/ have to/ need to/ are supposed to/ have good drawing skills. They help victims to remember details such as/like tattoos, piercings or the criminal’s clothes.
7) I realized I had been mugged. The thief was wearing (wore?) a baseball cap and was well-built. He also had a scar on his left leg. His voice was high and furious. He had a big gold watch and some bracelets on.
1) DNA can’t be changed since each person/each of us/ has different DNA.
2) Using this method, forensic specialists can identify thousands of criminals even many years after the crime.
3) He had a forked beard and a short moustache. When he pushed past me, I saw his dirty hands with horrible brown nails.
4) A new robot has been developed which is moved by thought, so it is useful for people with disabilities.
They can check a suspect’s fingerprints or his/her blood type.
5) They can also check a suspect's teeth and dental records.
They have to conduct effective interviews. They need to possess good interviewing skills to get information from the witnesses.
6) They should/are required to/ have to/ need to/ are supposed to/ have good drawing skills. They help victims to remember details, such as tattoos, piercings, or clothing details.
7) I realized I had been mugged. The thief was wearing a baseball cap and was well-built. He also had a scar on his left leg. His voice was high-pitched and furious. He had a big gold watch and some bracelets on.