chuck schumer is calling on former national security advisor john bolton and acting white house chief of staff mick mulvaney to testify as part of the senate's impeachment trial. now back to "dateline." >> reporter: as the father of four, bob motta appreciates a placid night of slumber. but on tuesday, july 16th, 2013, he woke up at 4:00 a.m. unable to sleep, the chicago area criminal attorney checked his office voicemail. that's when he saw that someone from california had left him a message -- >> the guy starts out, well, my brother got arrested down in southern illinois tore a dui. and i'm, like, "dui? i'm not driving down there for a dui."