The FBI Joint Terrorism Task Force said it is investigating 27-year-old Daniel Morley after police in the small town of Topsfield, Massachusetts found a cache of weapons and bomb-making materials in his home on June 9.

According to a police affidavit dated June 19, Morley told his mother that his best friend had bragged about knowing Tamerlan Tsarnaev, one of the two Chechen brothers suspected of detonating pressure-cooker bombs at the Boston Marathon finish line on April 15. Tsarnaev was killed in a shootout with police after the attack…

Topsfield police said they found in Morley’s bedroom closet a large, stainless steel pressure cooker and a black duffel bag. He also had materials to make a shrapnel bomb, such as black powder, igniters and pieces of metal that included ball bearings. In addition, he had a large assault rifle and a handgun, the affidavit shows.