For some reason the other night a new control channel was being used by the balto city police system(to my knowledge).....Monday night about at 11 or midnight, the city used a new channel where I had to go into search mode and find the control channel that way...I hate to alter my channels in my 296....Now usually they will change the control channel 11 pm just about every night and use a alternate control channel to about midnight.....Never know what or why these reasons are mabee someone could shine the light on this matter with a very outstanding reason!!...Also Baltimore County changes there control channel at midnight, everynight on end...The county has the same 4 or so channels they alternate...As of right now I hope someone noticed the change or whatever and post something on this...