Should a certificate of appealability issue in a Section 2254 proceeding where counsel learned directly from a juror that the jury had deadlocked 10-2 only because of character evidence that could not be admitted at the second trial, but counsel failed to revisit his strategy of relying on perceived weakness of the state's expert, rather than investigating and presenting expert testimony to establish that the victim could have died from an accidental fall or from regurgitating and choking on food found in his lung?

Should a certificate of appealability issue in a Section 2254 proceeding