Attorneys are on TV discussing this now. If the Martin family decides to file a civil suit. Zimmerman's defense attorneys will bring in the discarded evidence the prosecution kept from the jurors in the 2nd Degree murder case. That includes his fighting, his drug use, Trayvon's suspension from school several times (that could have sent him to jail) and all the information on his cell phone showing him to be feral in nature. Since George was found not guilty and that the FBI completely ruled out that Trayvon was racially profiled by him, it is most probable that the Martins would lose. They would also be responsible for all of Zimmerman's defense legal fees and he would also have the option of counter suing them. So I think it would be best for the Martins to accept that it would be a lost cause. I believe the DOJ is thinking the same thing since the FBI has made their case.