Police say Witmer's blood alcohol content was .223%, according to a toxicology screening, and there were no other drugs in his system.
Che is also a co-head writer for SNL, co-hosted the Emmy Awards, and has appeared on Chris Rock’s Top Five, @midnight, and Best Week Ever.
The organization's Penn State chapter announced the special guests Wednesday morning on Twitter.
All four pleading guilty on Tuesday were accused of playing a role in the alcohol-fueled bid acceptance night on Feb. 2, 2017 that precipitated the death of Timothy Piazza, a 19-year-old sophomore from Lebanon, N.J..
"What excites me about the forum event is that it gives students the chance to hear legislators focus on an issue that unites us all: the cost of higher education."
LaDuke ran for vice president as part of the Green Party in 1996 and 2000.