The line between love and obsession can be gossamer thin and easy to cross.

We here at Dateline have seen what can result when passion becomes a compulsion to manipulate,

to influence, to possess.

I didn't know that her interest in me would become an obsession.

No, no one ever does.

No one thinks a lover smile once all sunshine and summer freckles could become a weapon.

No one imagines a voice once soft as spring rain could now spit hard words like a nail gun.

This is the case about an obsessive love that Sean and Nelson had towards Ignacio

Garros.

That Sean and Nelson's nearly three year affair with Ignacio Garros had crossed a line

at some point was no longer a question.

The issue now was whether her addiction to the attentions of a married man was so powerful

that a former police dispatcher and law abiding mom of three would feel compelled to commit

murder.

She said I'm guilty of a lot of things as far as the affairs and bad choices.

She said I am not guilty of murder.

If not her, who, an angry bank customer, one of Sean's friends, or was a man's hand

behind all of this?

I completely think that he's capable of doing it like that.

In this episode, you'll hear about multiple plots to harass, intimidate, and ultimately

kill Heather Garros.

She asked me to go cut her brake line on her car.

...