( CNN ) -- Juan Aviles had been a Miami-Dade officer since 2006 . He and his sister were found shot to death in Puerto Rico . An investigator says `` three little bags with white powder '' were found on Aviles . The FBI is investigating the case as an act of terrorism, but no motive has yet been determined.
Juan Aviles had been a Miami-Dade officer since 2006 . He and his sister were found shot to death in Puerto Rico . An investigator says `` three little bags with white powder '' were found on Aviles . The FBI is investigating the case as an act of terrorism, but no motive has yet been determined.