There are four general questions for anyone who believes that Jeremy killed his family.
(1) Why did DCI Jones remain so convinced of Jeremy's innocence even when doubts were raised?
(2) Why did Julie remain by Jeremy's side for weeks whilst suspecting (or knowing) that he was a murderer?
(3) Is it really plausible that Jeremy, if he did kill his family, has a complete absence of conscience and the ability to fool all the professionals who have talked to him to evaluate his mentality, has comprehensively passed a polygraph test, and has convinced mike tesko and various other people that he has talked to extensively that he is innocent of killing his family?
(4) Why has mike tesko (if Jeremy did kill his family) been inventing discussions with informant(s) from EP for years?