From The Modesto Bee:

The decision to turn over the investigation was made after “new information” about Faisal Mohammad came to light Saturday, Warnke said Monday. He declined to elaborate.

“I’m not at liberty to discuss the information, but the developments on Saturday caused us to turn that over to (UC Merced) and the FBI will assist them,” Warnke said. A law enforcement official, who spoke to the Sun-Star on condition of anonymity, said the information included questions about the manner in which Mohammad was dressed during the Nov. 4 attack and the types of websites he may have visited in the weeks and days before. Additionally, the official said, investigators found a printout of an image of an Islamic State flag among Mohammad’s belongings.

The significance of the items, and any possible connection to the attack, is unclear and remains under investigation, the official said.