Man convicted of manslaughter for deadly knife attack in Tenderloin market

San Francisco jurors Thursday convicted a man of voluntary manslaughter for knifing another man to death inside a Tenderloin market last year.

Following a monthlong trial in San Francisco Superior Court, jurors deliberated a day before finding 46-year-old Patrick Sullivan guilty of the Nov. 30, 2009 attack on William Quinn, according to prosecutor Heather Trevisan.

Trevisan had argued the case was murder, while the defense claimed Sullivan was merely defending himself after Quinn, 40, followed him inside the Cadillac Market at 499 Eddy St. at about 1:50 a.m.

A judge in May threw out the murder charge at Sullivan’s preliminary hearing and ordered him to stand trial for voluntary manslaughter.

Prosecutors, however, later recharged the case as murder, arguing Sullivan was clearly the aggressor in the attack on the unarmed Quinn.

“Mr. Quinn absolutely had no business in that market,” Sullivan’s attorney, Deputy Public Defender Kwixuan Maloof, said today. “The only purpose in his walking into that market was to go after Mr. Sullivan.”

Maloof he was “quite disappointed” by the verdict, which he felt was a compromise by the jury.

Sullivan and Quinn had reportedly been arguing about drugs outside the market. Both men were later found to have been very intoxicated at the time.

Maloof said his client had just gone to the ATM to get $60 to buy drugs from Quinn, and that Quinn had then tried to rob him.

Though Quinn was unarmed during the confrontation, Maloof argued he “was posturing like he did have a weapon.”

Sullivan then stabbed Quinn in the chest, as market employees looked on.

Sullivan faces between four and 12 years in prison at his sentencing on Oct. 14.

Maloof said it is also within the sentencing judge’s discretion to sentence Sullivan to probation. He added that the sentencing date might be postponed.

Bay Area NewsLocal

If you find our journalism valuable and relevant, please consider joining our Examiner membership program.
Find out more at www.sfexaminer.com/join/

Just Posted

The COVID-19 pandemic has prompted changes to The City's streets including Slow Streets closures to increase open space access and the Shared Spaces program, which allows businesses to use public right-of-ways for dining, retail and services. (Examiner illustration)
COVID is reshaping the streets of San Francisco

Walk down Page Street, which is closed to thru-traffic, and you might… Continue reading

At a rally in February, Monthanus Ratanapakdee, left, and Eric Lawson remember Vicha Ratanapakdee, an 84-year-old Thai man who died after he was pushed to the pavement in San Francisco. (Ekevara Kitpowsong/Examiner file photo)
The criminal justice system can’t fix what’s wrong in our community

My 87-year-old mother walks gingerly, slowly, deliberately, one step in front of… Continue reading

Superintendent Vincent Matthews said some students and families who want to return will not be able to do so at this time. “We truly wish we could reopen schools for everyone,” he said. (Kevin N. Hume/S.F. Examiner)
SFUSD sets April reopening date after reaching tentative agreement with teachers union

San Francisco Unified School District has set April 12 as its reopening… Continue reading

José Victor Luna and Maria Anabella Ochoa, who cite health reasons for continuing distance learning, say they have been enjoying walking in Golden Gate Park with their daughters Jazmin, a first grader, and Jessica, a third grader. (Kevin N. Hume/S.F. Examiner)
Some SFUSD families prefer distance learning

Health issues, classroom uncertainties among reasons for staying home

Most Read