In Shadow — T.J. MacGregor

It's a hot Miami summer in the 1980s. A brilliant chemist, Denise Markham, is murdered at a university in Miami.

Detective John Conway discovers she developed a designer drug that enhances psychic ability and was administering it to friends who bankrolled her research. They are now exhibiting psychotic behavior and the killer is stalking Laura Perkins, a professor, the only witness to the crime, with whom Conway falls in love.