Fisher, who lives in Sayville, N.Y., where her daughter was raised, said that the headstone on her daughter's grave includes an etching of two hearts, one inside the other to represent her daughter and the unborn Rylan.
Michelle Young was a former cheerleader who loved to run and exercise. She had a master's degree in accounting from North Carolina State University and continued to root for her alma mater's sports teams.
"She had it all going," Fisher said.
Police affidavits state that Michelle Young's sister, Meredith Fisher, discovered the body after being called by Jason Young to stop by the couple's house to pick up computer printouts relating to a belated third anniversary surprise that Jason Young didn't want his wife to know about.
A bottle of extra-strength adult liquid Tylenol along with a medicine dropper was found on a dresser in Cassidy's room, even though a subsequent investigation found nothing in her medical records to suggest it had been recommended by a doctor.
"It is further believed that the medication was delivered to the child under the mistaken belief that it would cause drowsiness," read a portion of a search warrant for a DNA swab of Cassidy's cheek, dated July 25, 2007. "Once the child was asleep, the perpetrator would have been able to commit or continue with their attack without worrying about interference from the child."
When Cassidy was found, her feet and the sheets she had been sleeping in were clean. But the search warrant says small, bloody footprints were found on the floor of Cassidy's bathroom.
Police say they also noticed an adult print, found to be from a size 12 Hush Puppies Orbital shoe, that was left in the bloodstains. Police later found through store records that Jason Young had purchased a pair of size 12 Hush Puppies Orbital shoes more than a year before his wife's death, according to investigators reports.
Records seized from Jason Young's computer turned up search queries on "anatomy of a knockout," "head trauma knockout," "divorce" and "gay bars in New York City," according to police affidavits.
There were also searches for "right posterior parietal occipital region" -- the occipital region is in the back of the head -- and "ischemia," the decrease in the blood supply to parts of the body caused by constriction or obstruction of blood vessels, according to the affidavit.
According to police affidavits dated Feb. 13, 2008 and Nov. 6, 2008, Jason Young checked into a Hampton Inn in Virginia the night before his wife's body was found and had been having an affair. He was seen on hotel security cameras the night before his wife's body was discovered wearing two different sets of clothing within a few hours, authorities said.
Phone records show about 980 cell phone calls and text messages were sent between Jason Young and his alleged mistress between Oct. 4 and Nov. 3, 2006.
On Oct. 28, 2006, days before the murder, Jason Young e-mailed the woman he'd been seeing: "i don't know how all this happened, but i know how it will end up … two broken hearts … but, i don't care. i know there is pain in my future, but you are so worth it, even if it's only for a 'blink' in time."
According to the affidavits, there were 28 cell phone calls between Jason Young and his mother before 1:37 p.m. Nov. 3, the day Michelle Young's body was found. The 911 call from Meredith Fisher was made at 1:25 p.m.