With just a little nosing around - Francis G. Grady has a very nice rap sheet and a mugshot on mugshots.com.
Francis G Grady Mugshot - Mugshots.com - Find Mugshots Online. Official Records, Criminal Records, Arrest Records
His rap sheet after looking it up on Wisconsin's Statue search is impressive between 1990 and 2011. However, arson hasn't been one of his priors. Drugs, theft, battery, burglary... but no arson. His last crime was in 2011 which is where the mug shot came from. Most of his crimes are from Okagamie Wisconsin, which is just a few miles away from where this arson occurred near Appleton WI. I'm about 99% sure this is the guy.
940.20 (1 count) F = Felony
961.41 (1 count) Cocaine (CM), (1R)> one gram but no more than 5 grams. Class F Felony
343.44 (1 count) Operating while revoked - Misdemeanor
939.05 Parties to a crime
939.50 (3) For a Class C felony, a fine not to exceed $100,000 or imprisonment not to exceed 40 years, or both.
943.10 Burglary Felony
161.16 Controlled substances
161.53 Controlled substances
939.62 Increase penalty for habitual criminality
100.20 Methods of competition in business and trade practices in business shall be fair. Unfair methods of competition in business and unfair trade practices in business are hereby prohibited. Misdemeanor
943.20 Theft Felony