The National Transportation Safety Board (NTSB) has found that the small plane crash in Connecticut on Tuesday was intentional. From the Hartford Courant:

A student pilot and instructor were arguing shortly before a small plane they were in crashed near Pratt & Whitney Tuesday, killing one of them, a high-ranking local law enforcement official said Wednesday.

The source, speaking on the condition of anonymity, said the student pilot told the instructor he did not want to fly the plane any longer, although it is not clear why.

An initial search of an apartment where the student pilot, Feras M. Freitekh, was staying turned up no evidence of terrorism, the source said. But the FBI continued to search the apartment until about 2 p.m. Wednesday. Freitekh, 28, was killed.