Dying in the Dark (Tamara Hayle Series #7) Book

Tamara Hayle's has a terrible and dangerous past that has come back to hunt her. On a mission to find the murderer of Celia Jones she starts to have terrible nightmares every night that later haunts her throughout the day. Cecil jones is on the mission also to find his mother killer, later dying by being stabbed right in his heart.
Could it possibly be the killer that killed his mom? You'll have to read the book to find out for yourself.

Tamara refuses to back away from the crime scene, because she is really determined to find out who actually killed her friend and her lovely son. As she continues to search something terribly happens that moves the mood in the book to a more suspense level. With Celia being her friend on earth or not nothing has stopped Tamara from loving Celia the way she did when she was present. With all of her might and strength Tamara continues to search for her friend killer, along with the person who killed her son.
Do you possibly think Cecil died trying to find his mom killer or the murderer had a grudge against the family and killed what was only left?