Bound by Blood by P.A Upton

Brianna Reece an FBI agent working a case in Denver makes a great 1st impression on her new partner Morrison. She also has come to terms with being an Empath. She likes to work unusal crimes because her abilities help her to solve cases. Brianna can feel the victims final emotions,its a hard process but very helpful in finding their killers. She is working on a serial case when she finds out she is a witch. She falls in love with a suspect but he is later cleared and becomes her trusted friend and savior.Her father passes and that is when the truth surfaces about her long line of witch ancestors and she learns that her boyfriend Nathan is a vampire. The Killer is targeting her relatives all the women are her cousins. Nathan helps her learn her powers ,trains her and does an unbinding spell that her grandmother put on them so that they could hide. this allows Brianna to become stronger in her field. Nathan and Brianna conjured a spell to take back all the powers that the killer possessed when he drained the Garner witches which really made him mad. Agent Morrison turns out to be a trusted friend and keeps their secret he actually believes them. When in danger Brianna remembers what Nathan teaches her in training to get away and face the killer John. Also there is a twist with another female . But that's not the end of the story there's more in store for Brianna ,Nathan and Morrison I believe .