Really starting to look like TPS just jumped the gun on thinking they had a case for extortion. From what I understand, Giroux is primarily a homicide det, so I wonder when the last time he actually cracked an extortion case was. There are subtle differences between the two - like usually in homicide cases it's easy to deduce which party is the victim. Also, he certainly hasn't ever faced a foe like Rob Ford - prominent, well-connected, a lifetime spent around criminals worth of street smarts.
At this point I've given up all hope that extortion charges will be forthcoming. It's been what, a year? So I highly doubt any new physical evidence is going to come in. The only way he gets charged at this point I think is if Lisi or somebody else turns, so I think the only is a hell of a plea bargain they've been holding out on.