May God bless you and your...
Memories of your visits home to DuBois are all happy ones. Kathleen and Deborah have every reason to be proud of the fine man that you are remembered for.
Val (Hayes) George
February 25, 2020 | PA | Family


Washington, District of Columbia
JOHN LOUIS SLACK, PH.D On Friday, February 17, 2017. Beloved father of Kathleen Slack Baraki and Deborah Slack; and devoted brother of Rudy, Robert and Richard Slack. He is also survived by four grandchildren, Sophia, Sarah, Logan and Brooke; a host of other relatives and friends. Dr....
Read MoreMemories of your visits home to DuBois are all happy ones. Kathleen and Deborah have every reason to be proud of the fine man that you are remembered for.
Val (Hayes) George
February 25, 2020 | PA | Family
John, Harvey and I can't believe you are gone. You were the best neighbor we ever had.
Eileen Reeder
February 25, 2019 | Washington, DC | Friend

Marilyn Allison
March 09, 2017 | WASHINGTON, DC

R.I.P Uncle John, I'm glad I had the honor of meeting you. My thoughts' and prayers' are with you, and the family. I wish I could of been at your service.
Tonia Himes
March 04, 2017 | DuBois, PA
My sincerest condolences to the Slack family. I am very saddened to hear my beloved professor passed away. I am one of his former students from the University of the District of Columbia. Professor Slack really cared for all of us the students and always encouraged us to succeed. I will miss him greatly and the memories created will always be treasured in my heart. Rest in peace Professor Slack, I hope we make you proud.
Maribel Sanchez-Montague
March 04, 2017 | Washington, DC
On February 22nd I climbed the old papal fortress steps of Castel Sant'Angelo atop the fortress stands the Archangel.. I snapped a picture and sent it to John. I can now add goodbye my friend I will visit you often…..watch over us and keep us safe………… I know who you are….I always did. Part of the charm and complexity with John was the fact was forever a common man with uncommon talents. Talents that Sister Teresa saw in him and tutored him early too break his misconceptions about...
Alfred James Sheppard III
March 03, 2017 | Rome
When John and Margaret would come home to DuBois to visit his father Rudy and my mother Evelyn, we would play cards to all hours of the night. John loved to go fishing. John always had a smile on his face and was forever kind. May God hold his family in the palms of his hands in this time of sorrow.
Val Hayes/George
March 02, 2017 | Avonmore, PA
John brought laughter to our most serious meetings and comfort when you we faced challenges He will truly be missed. Peace and Blessings to the Family
Arlene
March 02, 2017 | DC
John was a frequent visitor to my office and he always brought a pleasant smile and disposition with him. He will be missed by many. We share his loss with his Family.
Ken Howard
March 02, 2017 | Washington, DC