The Scrutiny - Brotherly Bond, #2

FBI agent Thomas Mason will stop at nothing to solve the mystery of his wife's death, even if no one else believes she was murdered. He's been warned to stop investigating, but he'll follow the trail leading to an enigmatic suspect known only as Alice, even if he has to team up with his old special forces squad mate, Jude Scott. Jude is looking into a series of murders that might be related to the deaths at the college where Mason's wife died.
Someone is targeting people who take the wonder drug, Clarity, made by the secretive pharmaceutical company Jude works for. Despite their complicated history together, Jude knows Mason is his best chance at finding answers, but if his old friend gets in his way, Jude will do whatever it takes to protect what's his.