News roundup: State Rep. Marcelle to announce Baton Rouge mayoral run Thursday … Application period opens for Forum 35 leadership program … 911 fee on prepaid cell phones would double under proposal

Jumping in: After some speculation, former Metro Councilwoman and state Rep. C. Denise Marcelle says she is running for mayor. WBRZ-TV reports Marcelle announced the run Tuesday evening, saying in a r…