my brother committed suicide in Sep 11, I blame his ex-fiance for his death. can I file a wrongful death (suicide) case? my estate attny says no

my brother hung himself because he believed he was going to arrested (again) for violating a restraining order placed in Apr 2011. his ex-fiance was with him up until the day before his death but lied to police. she never removed the order even though she was with him and had no reason to fear him watsoever. she was called when my brother evaded the police & arrest and knew he was held up in his house but would not tell the police she had no reason to fear him. she was in court in March 2012 and told the judge she was with him up until his death but the Sep 2011 police report says she had a restraining/no contact order in place since Apr 2011. my estate attorney does not think he can prove this case and I beleive I can, do I have a case?