According to CNN, the Manhattan terrorist left a note in the truck today for law enforcement to find:

Authorities found a note in the truck allegedly used in the New York terror attack claiming the suspect did it in the name of ISIS, a senior law enforcement official told CNN.

The note was in English, the source said.

A man in a rented flatbed pickup on Tuesday drove down a busy bicycle path near the World Trade Center, killing eight people and injuring about a dozen others, police said.