Now Playing: News headlines today: Jan. 29, 2019

Now Playing: News headlines today: Jan. 31, 2019

Now Playing: FBI investigates tunnel leading to bank in Florida

Now Playing: Parents of killed police officer hire attorney

Now Playing: Baby ibuprofen recalled from Walmart, CVS, Family Dollar

Now Playing: Police arrest suspect caught on video punching 2 women at food cart

Now Playing: Firefighters struggle to battle fires in sub-zero temps

Now Playing: Chicago paralyzed by some of coldest temps on record

Now Playing: Parts of US slammed by snow, frigid temps

Now Playing: Dangerous deep freeze prompts states of emergency

Now Playing: Roger Clemens’ son sues bar over alleged assault

Now Playing: Mom of 2 donates kidney to single mom of 2

Now Playing: The best of Tom Brady and Gisele Bundchen

Now Playing: Record-breaking cold hits the Midwest

Now Playing: Life-threatening cold settles into the Midwest

Now Playing: Potential persons of interest in ‘Empire’ star attack: Police

Now Playing: Circuit attorney questions police probe of officer’s death

Now Playing: Los Angeles Rams player gifts Super Bowl tickets to team custodian

Now Playing: Police probing sinkhole instead find secret tunnel to bank

Now Playing: Video: Elderly dementia patient left outside alone at night