prime minister. the president was encouraged by the first and a slew of celebrities to help free the rapper after his arrest in sweden. a heat wave leads to the death of three people in maryland and arkansas and forced evacuation of 250 residents from a retirement home in philadelphia. now back to "dateline." ♪ reporter: julie griffith's family had hardly had time to absorb the horrific news of her death in a house fire when disturbing rumors started reaching them that investigators thought her death was foul play. the sheriff's department kept details of the murder quiet for days. >> i could not believe it. >> reporter: daughter-in-law, ali. >> i couldn't imagine anyone that would ever want to hurt her, much less set the house on