The sad fact is you are grieving. That makes chiropractic unsafe for the masses? There is plenty of research stating the small risk of stroke from chiropractic adjustment. The link can be found here http://www.subluxation.com/html/articles/KENT_Jul2000.htm
but research has also shown a higher risk of stroke from common aspirin (a study published in the September 1999 issue of Stroke: Journal of the American Heart Association found that taking more than 15 aspirin tablets per week -- what researchers consider a "high dose" -- doubles the risk of developing a hemorrhagic stroke, caused by bleeding in the brain. ) than with manipulation or adjustment. I think you will agree if you read the link posted. This matter is simple. No matter what health discipline you choose there are going to be stars in their field and there are going to be failures. In either case there are adverse events associated with health care. To my knowledge chiropractic has the lowest incidence of adverse events recorded evidenced by the lowest malpractice rates of any health care provider.
My point is this, you can find fault in any health care specialty and you can find poor practitioners in that specialty but don't throw the baby out with the bathwater. There are positive benefits to spinal manipulation.