The Whiskered Spy — Nic Saint

When Tommy the cat witnesses a murder taking place right beneath his favorite elm tree, at first he's not too worried. After all, humans will do these things, and as long as his own human keeps the kibble and the milk coming, life goes on. But when the murdered woman's ghost comes haunting him and accuses him of gross negligence by not interfering when he had the chance, things definitely take a turn for the mysterious.