He is the prime suspect in the case.

他是这个案子的首要嫌疑人。

《牛津词典》

He's the police's prime suspect in this case.

他是该案中警方的主要怀疑对象。

《牛津词典》

A lawyer from the district attorney's office presents a case against the suspect.

地区检察官事务所的一名律师对嫌疑犯提出了指控。

youdao

The case of the suspect was thus decided.

VOA: special.2009.04.18

In its ruling on Saturday, Italy's highest appeals court also upheld the 15-and-a-half year conviction of the lead suspect in the case, Michele Aiello.

BBC: File photo of Salvatore Cuffaro in Palermo, 2002

The main suspect in the case, Dr Khelifa Hanouti is accused of impersonating an obstetrician and running an abortion clinic in the Algiers suburb of Ain Taya, the agency says.

BBC: Algeria-France child trafficking trial opens in Algiers

Reports said police identified Ziya T. as the main suspect in the case after DNA samples taken from his two brothers and a sister matched those found beneath Sierra's nails.

WSJ: Turkey: Man detained over NYC woman's death