"People have been far more interested in conversation than in killing. It is only a matter of avoiding the hazards."

And, in fact, with that in mind... He relaxed, lowered his weapon. Cast another glance around the space, to make certain they was no one else around.

"I am going to take a look around," he announced, addressing Joan more than Sherlock, gesturing with his free hand to indicate the space around them. "I will not come near you."

After all, he had no reason to attack them if they didn't do so first.