By Allison Scarbrough. Contributing Editor. – Donald Keith Martinez, 28, of 508 ½ E. Danaher St., Ludington, was found guilty Oct. 14 of controlled substance, possession of marijuana. He was sentenced to 90 days in jail with credit for nine days served; one year discretionary jail for two years; no alcohol/drugs; subject to random preliminary breath tests (PBTs) and drug…