I've been investigating a series of murders in London.
A Detroit police detective investigates a series of crimes with its roots in the 1960's.
I am investigating a series of murders on the planet Bellerophon.
Later, she and Don are partners while investigating a series of home invasions.
Their quest leads them to investigate a series of mysterious asphyxiations.
Walker and Pilgrim investigate a series of murders at a college campus.
I had visited the state five times, investigating a long series of very strange events, and had many friends there.
The film centers on a police detective investigating a series of gruesome murderers.
A coroner becomes involved with a prostitute, while investigating a series of murders.
I discovered the demons while investigating a series of murders.