Trump did say he was indicted more times than Al Capone.

The St. Valentine's Day Massacre and Al Capone—Excerpt from Get Capone

THE COLDEST CASE: Since February 14, 1929, when seven men were gunned down inside a Clark Street garage, the mastermind behind the St. Valentine’s Day Massacre has remained a mystery, though suspicions usually point to Al Capone. Now a new biographer has uncovered fresh information implicating a different suspect—a forgotten Chicago felon with a simple and timeless motive: revenge.

https://www.chicagomag.com/chicago-magazine/may-2010/get-capone-st-valentines-day-massacre-jonathan-eig/