During the investigation work over a long period of time, detectives are likely to get some occupational weaknesses in psychology, which may lead to setback psychology.

侦查人员在长期的侦查工作中，容易滋生心理上的职业弱点，形成某种挫折心理。

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"The investigation team have identified 10 occasions during this period of time, when they had the opportunity to identify that the body purporting to be Grace Kamara, was in fact Christopher Alder and working practices prevented this, " she said.

BBC: Grace Kamara and Christopher Alder

"We worked very hard over a period of time to get the information, the evidence we felt was important for a criminal investigation, " he said.

CNN: High court refuses to step in on ex-congressman's case

Older former residents of children's homes would not have been able to tell their stories if the original terms of the region's historical abuse investigation had not been redrawn last year to extend the start date of the time period covered from 1945 to 1922.

BBC: Sir Anthony Hart