People v. Jackson 

Defendant was denied a fair trial by admission of evidence of other criminal acts. Prosecutor argued in rebuttal that motive for Defendant to murder his disabled mother was to obtain money for drugs, and State introduced evidence of his drug use. Unprosecuted drug use is admissible to show motive only if after establishing that the defendant was addicted and lacked financial resources to sustain habit, and neither was shown in this case. Commentary on drug use was bad-character accusation prohibited by rule against admission of other crimes to show criminal propensity.