bu ifadenin doğru yazımına gelince:
sanığın "tevilli ikrarı"
Kaynak: Türkçe-İngilizce Hukuk Sözlüğü
Mustafa Ovacık

Alternatif bir tanım olabilir.

Tevilli ikrarı

I am not very sure, but these terms do occur, if rarely, in legal texts, and the meaning seems to fit.

http://webcache.googleusercontent.com/search?q=cache:UBfzpFr...
The trial Judge having referred to instances where an admission could amount to a confession by inference although the person making the admission did not directly confess that he committed the offence asked the Jury to consider whether P11 by inference was a confession of guilt, although the 2nd accused did not pointedly state that he was involved in the crime.

http://webcache.googleusercontent.com/search?q=cache:U6R4tZE...
Thomas M. Bram was convicted and sentenced to death in federal court in Boston in 1896 based on what was deemed an “inferential confession” to a triple murder aboard a U.S. merchant ship on the high seas — even though he emphatically denied that he had committed the crime.

http://www.google.com.tr/#q="confession by implication"&hl=t...

Bir kere bu terim, "tevil yoluyla ikrar" olmalı. "Teviri ikrar" diye bir şey yok sanırım, emin değilim gerçi. Bülent Arınç'ın konuşmasıyla ün kazanmıştır. Dolaylı yoldan anlatma, bir kelimeye başka bir anlam yükleme anlamına gelir. Görünür anlamından başka anlam verme demektir. İngilizcede bunun için "implication" kelimesi kullanılır.
"Confession by implication"