Newtown officials have signed off on funding for police cameras.  First Selectman Dan Rosenthal says the cost is expected to increase substantially in the coming months and since many units need replacing, it's best to do it all at once.  Police Chief James Viadeo says some cameras are 10 years old, with the replacements expected to last as long.  Newtown had body cameras prior to the state Police Accountability bill, making the town ineligible for the grant program offered to departments with no pre-existing program.  The body cameras were paid for out of asset forfeiture funds.  The data terminals are expected to last 5 to 6 years.  Nearly $116,000 to replace the police vehicle mobile data terminals will come from the capital and non-recurring fund.