Shooting To Kill - Thea Campbell Mysteries, #5

When Thea Campbell's veterinarian collapses after accidentally injecting himself with a horse vaccine, Thea rushes to his aid. Despite her best efforts, the much-loved vet dies. In the wake of this tragic fluke, Thea reconsiders her own cautious approach to relationships. Life, Thea decides, might be shorter than you expect, and procrastination a death-bed regret. She immediately accepts her best friend's last-minute wedding invitation and embraces the planning of her own marriage to fiancé Paul Hudson.
However, on return from her friend's wedding, Thea has little opportunity to pursue her new philosophy. Her veterinarian's death has been ruled a murder, his young assistant arrested and accused of deliberately substituting euthanasia solution for the West Nile vaccine. The only person to believe in her innocence is Thea's sister Juliet. She intends to investigate and begs Thea for help. But Thea believes the case is closed and the police have arrest the right person.
Besides, she intends to concentrate on planning her wedding. However, the chilling fact is Thea was right about life being shorter than expected. Procrastination is not on the killer's agenda.