JOLIET, Ill. (CBS) — One of Drew Peterson’s sons says he is disappointed that his father has been convicted of murdering the young man’s mother.

As WBBM Newsradio’s Bernie Tafoya reports, Thomas Peterson is the son of Drew Peterson and Kathleen Savio. He is a sophomore in college, and he expressed fury about the verdict on Facebook.

LISTEN: WBBM Newsradio’s Bernie Tafoya reports

“To say the least…I’m extremely disappointed. During the past 5 years…I got to see full grown adults act like children, and now they are parading around my front door,” Thomas Peterson wrote. “Who do I have left? Who do my siblings have left? Oh yeah…the pastor, the lawyer, my aunts, and all of my mom’s friends who LISTENED to my mother’s pleas and DIDN’T do anything about it. Now she is dead, and you went forth to break the Constitution to blame my dad. I’m sorry, but that doesn’t seem very believable to me…but since the rest of the world thinks otherwise, this is your fault, you should have come forward earlier. Now, I have a broken family without a salary, and some woman who sees it important to bully me over the internet because of my Dad. I hope you are all happy.”

He says the pastor and lawyer who testified about what they heard Drew Peterson’s fourth wife, Stacy, say about Peterson killing Kathleen Savio, broke the Constitution to blame his dad.

Drew Peterson’s attorney, Joel Brodsky, tells the Chicago Sun-Times that Thomas Peterson was in tears when learned of the verdict. The newspaper reports Thomas Peterson and his brother, Khristopher, refuse to believe that their father is actually guilty.

A jury on Thursday convicted Peterson of murdering Savio.

Savio’s body was found in a dry bathtub in 2004, and her death was initially ruled an accidental drowning. But an exhumation and a new autopsy led her death to be reclassified as a homicide after Stacy Peterson disappeared in 2007.