Perfect Victim. Nadia Stafford

Fifteen years ago, hit man Tyrone Cypher disappeared into the wilderness. Now he's back with a job for his old "friend" Jack. While Jack doesn't consider Cypher much of a friend, the job is ideal for Nadia. There's a killer in Honolulu, targeting those involved in the family court system. When no one else would take one victim's cases, lawyer Angela Kamaka did, putting herself squarely in the killer's cross-sights.
For Nadia, Angela is the perfect victim-an innocent person in danger for doing the right thing. So Nadia and Jack get an all-expenses paid trip to Hawaii courtesy of Tyrone Cypher, who has his own reasons for wanting to keep Angela safe. Note: this is a novella, not a full-length novel.