what does "it goes both ways"mean?
“I know. The fact that I called Vinnie when I found it weighs on my side. And the anonymous tip to Wolfe from a disposable cell phone— that seems sticky. But he wanted me to know that Wolfe’s digging into my background, my movements, trying to put you and me together before Lindsay’s murder.”
“We weren’t, so he can’t.”
“No, he can’t.”
“Relay all this to your lawyer.”
“I did. He’s on it. There’s nothing, Eli, and I think Wolfe only cares about me as a conduit to you. If he somehow links us to Duncan’s death, it’s more feasible you were involved in Lindsay’s.”
“It goes both ways,” he reminded her. “Since we’re clear on Duncan, it adds weight to me being clear on Lindsay’s.”