08/03/2011 04:11 pm ET Updated Oct 03, 2011

David Mark Clark, Man Accused Of Running Down Bikers In Rampage, Pleads Insanity

Last June, bicyclists in the Mission and Potereo Hill neighborhoods were subjected to a terrifying scene--a man in an SUV going on a late-night, bike-ramming rampage.

While the suspect, David Mark Clark of Albany, only spent a brief, six-minute period slamming into every cyclist he could find, it was more than enough time to seriously injure three people before crashing his SUV into a pole and fleeing on foot.

Clark, a "crystal therapist" and tennis pro, has been charged with four counts of attempted murder, four counts of aggravated assault and four counts of hit-and-run. In a hearing earlier this week, he pled not guilty by reason of insanity.

The Examiner reports:

In Clark's videotaped statement to police, he wept repeatedly, even when officers were out of the room. After repeatedly insisting that "they're following me," he eventually said, "I feel like I'm in a hallucinatory state right now," and asked for a doctor.

"I'm hearing voices in my head telling me things," Clark said. "I don't know what happened." Minutes later, he told police, "I was in a terrible accident."

Clark was arrested the day after the rampage when he walked into an Albany police station claiming his car had been stolen. However, after Clark left the scene, police found his keys, wallet and cell phone still in the car and quickly concluded that his story of being carjacked was a fabrication.

SF Appeal reports:

According to some accounts, the suspect was seen driving on the wrong side of the road and the car's engine was roaring as it came at the bicyclist, according to Sgt. Jon Kasper, an investigator in the case.

[Police Chief George] Gascon said the four bicyclists had been "basically mowed down."

Clark's formal arraignment is scheduled for August 16th.