Investigator says authorities do n't know who the was that led to death . Defendant 's father says his son 's face was swollen and had gashes the next day . Attorney for Trayvon Martin 's family call apology ` ` disingenuous '' George Zimmerman tells the teen 's family he is sorry for what happened .
Investigator says authorities do n't know who started fight that led to death . Defendant 's father says his son 's face was swollen and had gashes the next day . Attorneys for Trayvon Martin 's family call apology `` disingenuous '' George Zimmerman tells the teen 's family he is sorry for what happened .