Now Playing: McDonald's Compares Ad Burger to Restaurant Burger

Now Playing: Insurance warning for home owners

Now Playing: Possible break in relentlessly cold spring weather

Now Playing: Police cam shows officers circling the parking lot where teen died in his car

Now Playing: Missouri governor accused of a second felony

Now Playing: Manhunt in Georgia for convicted killer

Now Playing: Trump praises Michael Cohen on Twitter

Now Playing: Kim Jong Un under international spotlight after halting nuclear tests

Now Playing: Thousands pay respect to Barbara Bush at her funeral in Houston

Now Playing: Government expands warning over contaminated romaine lettuce

Now Playing: N. Korea says it will suspend all nuclear and ICBM tests

Now Playing: Surveillance video shows Prince in final hours before his death

Now Playing: Mourners pay their respects to Barbara Bush

Now Playing: Investigators searching for motive after 2 officers fatally shot in restaurant

Now Playing: Hotel housekeepers are using a new tool for protection

Now Playing: Comey memos: 15 pages of meticulous detail, written in real time

Now Playing: New York Yankees step up to the plate for 4th-grader in need

Now Playing: Democratic Party launches legal attack against Trump's inner circle

Now Playing: Woman wanted by authorities in double slaying arrested at restaurant

Now Playing: 19-year-old arrested after entering school and allegedly shooting student