RALEIGH -- Authorities have released more information in the Michelle Young murder investigation.

A search warrant released on Thursday puts the spotlight on the actions of her husband, reading “upon review of the investigation thus far, and due to his lack of cooperation, Jason Young's participation in his wife's murder cannot be ruled out."

Investigators detailed how Jason Young had been uncooperative from the start, from hanging up on the investigator to not agreeing to be interviewed despite repeated requests.

Investigators say before the murder, someone used Young’s computer to search the internet about topics including: “anatomy of a knockout,” “head trauma knockout” and “divorce.”

The warrant also shows Jason Young had an affair, and that he and the woman exchanged more than 900 phone calls and text messages between October and November of 2006 and that the relationship didn’t end when his wife died.

One particular email between Jason Young and Michelle Money from October 28, 2006 read, "I know there is pain in my future, but you are so worth it."

Michelle Young was found beaten to death in her home two years ago. She was pregnant at the time.

Earlier warrants show investigators found a bloody shoe print at the crime scene that matches a pair of shoes owned by Jason Young.

Jason Young lives in the western part of the state and has not been named a suspect. But, Wake County Sheriff Donnie Harrison said the murder case is still an active investigation.

“The SBI is still working with us,” Harrison said. “It's something we hope we'll bring to some resolution pretty quickly."

The release of the search warrant comes days after Michelle Young’s mother filed a wrongful death lawsuit, asking a court to declare that Jason Young killed her daughter.

The lawyers who represent Michelle Young’s mother, Linda Fisher, said this kind of evidence is something they could use in their suit. Fisher is seeking to make her granddaughter the sole heir of Michelle Young’s estate, so she filed a wrongful death lawsuit.

Jack Michael, one of the lawyers in the civil suit, explained that Jason Young could be deposed as part of their case. He said that may be something criminal prosecutors would be interested in.