also the fact, you know, that investigators have been quite tight-lipped about any new developments so this is obviously, you know, a huge development that we're hearing today. >> reporter: certainly coming as a shock because as you said, they have been so tight-lipped this entire time. nearly the full seven weeks there has been very little information released, and i think that's why some of the families, at least one of the families have been very outspoken, the goncalves family frustrated with the lack of information but the entire time police were telling us and the public that they had strong leads, that they had a lot of information coming in and that they were trying to keep the information close to protect the integrity of this investigation. this happened, again, seven weeks ago, four students murdered. the coroner says they were likely murdered in their sleep. some of them had defensive wounds and so it appears that they were trying to fight off the attacker. it happened in the early morning hours after a night of partying.