Cold Case Connection by Dana Mentink

Hunting down old leads puts a murderer on their trail.

Convinced his sister’s death wasn’t an accident, private investigator Sergio Ross is determined to catch her killer. But with all the clues hinting at a connection to another unsolved murder, he has to join forces with Helen Pike — a woman linked to both deaths — to find the truth. Can they follow the cold evidence trail to get justice…before they become the next victims?