. >> looking forward to seeing you grech. and a new boost in construction.figures show that the market is still in a slump. housing starts areum 2.8 percent in march. and compared to a year ago they were down six percent and building permits saw the fourth drop in five months. >> and new concerns about gps tracking. the monitoring devices helping to and the rapes and killings of four women in california and possibly a fifth. the mother thinks there is a problem with the technology itself or the people who monitor it and should have prevented the crimes from happening in the first place. >> to know about the gps monitoring on them until earlier today. i am not fond of it now. it seems not to work. >> and the whole situation raising questions about the effectiveness of the devices and are they effective of deterring convicts from more crime. we have bill here. thank you for joining us, bill. how exactly do the gps device work? >> first of all, sandra, all of the devices are not all created equal. some monitor blood levels for alcohol. and make sure someone goe