harare u.s. citizen charge friday attempt overthrow zimbabwean government carry sentence 20 years jail police early accuse insult 93-year-old president robert mugabe martha donovan work magamba tv describe zimbabwe lead producer political satire pick dawn raid harare home lawyer say donovan deny charge expect court saturday lawyer obey shava say police spokeswoman charity charamba could reach comment new much serious charge donovan first charge insult undermine president accord police charge sheet accuse last month call mugabe selfish sick man twitter first arrest since creation ministry cyber security last month charge carry maximum sentence one year jail lawyer say shava say police accuse donovan set magamba behind shadowy twitter character call matigary set another twitter account openparlyzw sole purpose overthrow government unconstitutional mean government particularly uneasy social media activists pastor evan mawararire thisflag movement last year use social media organize stay-at-home demonstration big anti-government protest decade national election due 2018. police search warrant show central investigation post donovan twitter fee refer goblin whose wife step-sons import rolls-royce apparent reference mugabe though name statement police see reuters donovan say deny allegations level baseless malicious wish say u.s. embassy harare confirm american citizen arrest say monitor situation closely shava say client refuse sign new document know warn caution statement fresh charge document set government case sign signal suspect understand charge sign statement less charge police seize computers cellphones electronic devices raid home zimbabwe police charge u.s. citizen anti-government plot