Tied to the Mast

Psychiatrist Anna Nava knew the body on the table.

It was Alexis Coleman, one of her patients at the clinic, a promising med student at the University of California. She had just been pronounced dead of an overdose.

An hour before, Alexis had sent out a text, "suffocating ... can't go on living like this." Of course, doctors had ruled it a suicide.

But four days earlier she had texted something even more cryptic. Something about a clinic ... a van... "Could be big. Talk Sat."

Two seemingly d...