>>>
the family of slain teen trayvon martin is renewing calls for federal involvement in the investigation into their son's death this morning. nbc's
kerry sanders
is in sanford, florida, with the latest this morning. kerry, good morning to you.
>>
well, good morning, savannah. lawyers for trayvon martin's family say today they will ask the
justice department
to investigate the
police department
and the state attorney's office. they're hoping the feds can get answers as to why, when a 28-year-old
white hispanic
shot and killed an unarmed black teenager, no one was charged in the shooting death. in rally, after rally --
>>
we're all
children of god
!
>> reporter:
a growing chorus of trayvon martin supporters demanding the same thing. an arrest.
>>
don't talk to us about violence, handcuff the violent one.
>> reporter:
but 28-year-old
george
zimmerman
maintains he was the victim. that he shot trayvon martin because the teenager was beating him and he feared for his own life.
>>
george
zimmerman
acted in self-defense. and i believe that the
stand your ground
law will apply in this case.
>> reporter:
in miami sunday, anger at what protesters believe to be an imperfect legal system.
>>
i want to warning the state of florida, you might have let casey anthony go, but you better not let
george
zimmerman
go.
>> reporter:
for trayvon's mother, sabrina fulton -- it's been 36 days of waiting for something to happen. the
special prosecutor
is still collecting evidence. yet to be interviewed, trayvon's girlfriend who was on the phone with him moments before he was shot.
>>
one of the critical witnesses for the
special prosecutor
has to be the girlfriend of trayvon martin, who in effect becomes the voice of trayvon martin when she explains what he said to her.
>> reporter:
sources say that the special investigator could be talking to that girlfriend as early as
“ ”