Powers Vol 10 TPB - Cosmic (2013)

Collects Powers (2005) #13-18.
Powers are dropping out of the sky, leaving bloody bodies in their wake. When one of the victims is revealed to be the cosmic guardian of our galaxy, homicide detectives Christian Walker and Deena Pilgrim find themselves knee deep in cosmic doo. And if things weren't bad enough, Internal Affairs would like to have a word with Detective Pilgrim.