I think that Partridge is still alive because when Lisbon checked the GPS tracker, only Partridge's tracker was at the location. The other 6 suspects' trackers were elsewhere.

What I believe has happened is Partridge has knocked Lisbon unconscious. Now that Lisbon thinks Partridge is dead (which is the last thing she saw), it is possible that in the next episode, Partridge's body may 'disappear', courtesy of Red John (aka Partridge) taking it away. Although Partridge may have simply got up, painted Lisbon's face, then got away, with the knowledge that Lisbon thinks Red John killed Partridge then took his body away to dispose it in his own way (although it seems far-fetched because RJ has always left his victims bodies at the crime scene).