Roughly break up the chocolate into a medium bowl.
Heat the cream, vanilla extract, bourbon, sugar free syrup, and salt in a small saucepan, until it just begins to simmer.
Pour over the chocolate pieces, and stir or whisk until the chocolate has become shiny and smooth.
Fold in TWO pints of raspberries that have been washed and patted dry.
Pour over the crust, smoothing out.
Let chill for about 1 hours, then decorate with the remaining raspberries, gently pushing into the chocolate.
Chill for at least another 2 hours.
Serve with lightly sweetened whipped cream, if desired.