Ghost Girl. DeeDee Olsen, Ghost Girl, #1

In this first installment of the Ghost Girl Series, Dr. Diedre "DeeDee" Olsen Blanchard shares how, at the age of fourteen, she came to acquire her phenomenal paranormal abilities, how she uses them to assist local law enforcement and provide solace to those grieving the deaths of loved ones. On the eastern bank of Lake Okeechobee, deep in the black gold of the Glades, lies the rural farming community of Pahokee.
Famous for its agriculture, tropical fruits, fishing, airboats, and alligators, it's also the home of DeeDee Olsen. And where a cold-blooded murderer is on the loose. In the fall of 1978, the town is in a panic when the Homecoming Queen disappears after the Homecoming football game. Last seen with her abusive boyfriend and his equally abusive friends, DeeDee is convinced that they're responsible for her disappearance.
Without evidence proving that they committed a crime, telling the police chief about her suspiciousness would be futile. However, when the spirit of the missing girl appears to DeeDee pleading for her assistance to solve her murder, she has no other choice than to do exactly that. But the results don't fare well for her. The police chief is neither interested in nor amused by her bizarre and unbelievable story about how she knows the missing girl is dead.
Frustrated, hurt, and embarrassed by his stern hostility toward her, she storms out of the station more determined than ever to convince him that she's telling the truth. She has to find a way to make the chief believe her and she has to do it quickly. The killer is now stalking and threatening her. He knows about her psychic abilities. He knows where she lives. He's observed her pay multiple visits to the police station.
Realizing that his intimidation tactics and confrontations do nothing to dissuade her, he feels pressured to take the matter into his own hands. Unwilling to allow her to destroy his life by revealing what she knows about him, he makes it his personal goal to shut her up permanently. That means he'll have to kill again.