Explosion of a car in Allentown, Pennsylvania: Jacob Schmoyer sent letters before the fatal explosion indicating that he was the cause, according to authorities

ALLENTOWN, Pa. – A man who died with two others in a car explosion Last weekend he had sent letters to his family and the police telling him that he had used an explosive to kill himself, his son and his adult friend, the investigators said. Officials from the Federal Bureau of Alcohol, Tobacco, Firearms and Explosives revealed the contents of these letters at a press conference held Thursday with prosecutors and the police. Allentown.

Officials said that Jacob Schmoyer, aged 26, had sent the letters before the explosion to Allentown, Pennsylvania, who had killed his 2-year-old son, Jonathan "J.J." Schmoyer and a friend, David Hallman, 66 years old. the explosion of debris and scattered body parts several blocks away.

Kathleen Pond, Schmoyer's grandmother, told the WFMZ that she had received a letter on Wednesday. She said, "Maybe in my heart I knew that he would, but never at J.J."

"The scene is probably the most horrible thing I've ever seen," Allentown police chief Tony Alsleben told CBS News correspondent Jericka Duncan earlier this week. . "It was a big scene, there were a lot of components involved." There is a lot of evidence, so it takes time to process them. "

At least 50 federal officials were assisting local authorities to search for evidence of the cause of the blast. They have excluded terrorism.

"We know we are dealing with a material that has exploded," ATF officer Don Robinson told reporters on Monday. "A lot of energy was released during this explosion, so we're dealing with an explosion, maybe it's an accident or something."