First Filter
By all means I welcome help in this. I do not simply look at this as one of my cases. When I say I will do my best I mean I will do nothing less than I would do if it was Joan who was missing. I would tear the world apart for her. I will do the same for Sherlock.
I will be at [address] in an hour attempting to talk to the homeless population to get leads. I would not mind company, especially since you know Sherlock well and can tell them what to look for. I would prefer if we all work together, in coordination with each other. We may have better luck that way.