He had collaborated OR he collaborated

0 01b00The Pope has named a new archbishop of Warsaw after Stanislaw Wielgus quit admitting he had collaborated with Poland's communist-era secret police.02b00 02br
00Pope Benedict XVI named Kazimierz Nycz, 57, who has been bishop of the Baltic city of Koszalin-Kolobrzeg since 2004. 02br
00Bishop Wielgus resigned on 7 January at the service intended to install him as the city's new archbishop. 02br
00He admitted spying on fellow clerics, many of whom had opposed the Soviet-backed government in Poland. 02br
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01b00Church investigation02b00 02br
00Bishop Nycz is thought to have an unblemished record under communist rule. 02br
00Bishop Wielgus has apologised for his actions but said he was blackmailed and harassed into co-operating with the secret police. 02br
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00Please look at the following sentence of the above.02br
01b00The Pope has named a new archbishop of Warsaw after Stanislaw Wielgus quit admitting he had collaborated with Poland's communist-era secret police.02b02br
00When you write 'The Pope has named a new bishop' , it is the present perfect tense. When you write 'he had collaborated with Poland's secret police' , it is the past perfect tense.02br
00Is it proper to write the past perfect here? I think it would be fine to write the simple past tense here. Just he collborated with Poland's secret police is fine.02br
00Your comments please.02br
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