Doodler

The Doodler, also known as the Black Doodler, is an unidentified serial killer believed responsible for 14 slayings and three assaults of men in the gay community of San Francisco, California between January 1974 and September 1975. The nickname was given due to the perpetrator's habit of sketching his victims prior to their sexual encounters and murders by stabbing. The perpetrator met his victims at gay nightclubs, bars and restaurants.

Murders

It is believed that the Doodler killed up to fourteen people. A consistent method used in several of the killings was stabbing the victims in the front and back of their bodies. Police theorized that the victims had all died after meeting with the suspect near the locations where their bodies were recovered. Police initially believed there could have been as many as three different perpetrators during early stages of the investigation.

Gerald Cavanaugh

Gerald Earl Cavanaugh, a Canadian-American immigrant, is believed to be the Doodler's first victim. He was forty-nine at the time of his murder, which had occurred by stabbing. Cavanaugh's fully clothed body was located on January 24, 1974, lying face-up on Ocean Beach in San Francisco, California, in the early hours of the morning. He had died hours before. He was determined to have been conscious at the time he was killed and had attempted to resist his killer, as he had self-defense wounds noted. He initially remained unidentified, being temporarily known as "John Doe #7" by the medical examiner. He was a single man with few details about his personal life.

3Doodler

The 3Doodler is a 3D pen developed by Peter Dilworth, Maxwell Bogue and Daniel Cowen of WobbleWorks, Inc. (formerly WobbleWorks LLC). The 3Doodler works by extruding heated plastic that cools almost instantly into a solid, stable structure, allowing for the free-hand creation of three-dimensional objects. It utilizes plastic thread made of either acrylonitrile butadiene styrene ("ABS"), polylactic acid ("PLA"), or “FLEXY”, thermal polyurethane (“TPU”) that is melted and then cooled through a patented process while moving through the pen, which can then be used to make 3D objects by hand. The 3Doodler has been described as a glue gun for 3D printing because of how the plastic is extruded from the tip, with one foot of the plastic thread equaling "about 11 feet of extruded material".

Origins

The inventors of the 3Doodler (Maxwell Bogue and Peter Dilworth) built the first 3Doodler prototype in early 2012 at the Artisans’ Asylum in Somerville, Massachusetts. After waiting fourteen hours for a 3D print job to complete, they discovered that the printer had missed a line.