A Boston man was convicted by a jury Wednesday of involuntary manslaughter in connection with a fatal shooting in Brockton that took place just months after prosecutors dropped a cocaine distribution charge against him amid a state drug lab scandal.

Donta Hood, 25, was found guilty in Brockton Superior Courtafter a 10-day trial in the death of 49-year-old Charles Evans, who was found shot in the chest on May 14, 2013, according to the office of Plymouth District Attorney Timothy J. Cruz.

Prosecutors said witnesses identified Hood as the shooter and investigators found the murder weapon belonged to him. He was also convicted of firearms charges, but acquitted of charges of shooting a gun within 500 feet of a building and armed robbery.

Evans’s death came six months after the state dropped its prosecution of Hood on a charge of possession of cocaine with intent to distribute.

He had been convicted on the count in 2009, but the verdict was later thrown out in the chaos surrounding disgraced former chemist Annie Dookhan, who served prison time for submitting false reports and tampering with evidence while at the Hinton State Laboratory in Jamaica Plain.

Hundreds of defendants have challenged their convictions as a result of the evidence tampering.

According to Cruz’s office, Dookhan had tested the samples used to convict Hoodof the drug charge and testified falsely at his trial.

“By the time Dookhan’s conduct came to light, the cocaine relating to Hood’s drug conviction had been destroyed as procedure,’’ Cruz’s office said. “There was no physical evidence to re-test.’’

Hood is scheduled to be sentenced July 11. A codefendant, William Allen-Robinson, 24, is scheduled for trial July 6.

Andy Rosen can be reached at andrew.rosen@globe.com. Follow him on Twitter at @andyrosen.