Jim Morrell

But defense attorney Griffin says Jason Weir would say anything to save himself.

And he reminds jurors how cocky Jason was when he confided to Jim Morrell.

But whatever the jury may think of Jason's callous words, the state finally has some forensic evidence to bolster his story.

In 2005, prosecutor Corcoran had Marina's fingernail clippings tested by another lab, and it found DNA.

DNA which, while not conclusive, is a partial match to Tom Lally.

The DNA underneath the fingernails could be from Tom Lally.

Yes.

Is that right?

Yes.

and it excluded the other two defendants.

It could not be from either Jason Weir or Anthony Calabro.

Lally's uncle believes the DNA got under Marina's nails when his nephew tried to help her.

But he knows things look bad.

Seemingly backed into a corner, Tom Lally takes the stand in his own defense.

Just switch the roles, Lally says.

Jason was the killer.

It was Jason who took him by surprise that horrible day.

It was Jason, Tom says, who staged the scene.

And then he says Jason bullied both him and Anthony into lying to the police.

Prosecutor Corcoran doesn't hide her disgust at this story.