Interesting profile of Jack Yaakov Teitel, and sketches of attacks devised.
By the way, Teitel’s official surname is actually Tytell, despite listings via Google and Wikipedia saying otherwise. At least it was Tytell before he moved from the US to Israel.
This site shows diagrams on bomb he sent to the Ortiz family, and a device placed under a police car. He has poor knowledge of Hebrew.
The Shin Bet say he was working alone, however this is contradiction to what the Ortiz family say was on the video security system, the plot thickens….