Prey to All
Natasha Cooper
As a favor to her friend, Trish decides to investigate the case of Deborah
Gilbert, a woman accused of suffocating her ailing father with a plastic
bag.  Although it is widely known that Deb and her father never got along,
she swears she is innocent - yet someone hated this abusive, bitter old
man enough to murder him. 
This summary is courtesy of McNaughton Books