last night that deadly shooting sparked protests outside the arlington police department. omar villafranca is there. good morning. >> reporter: good morning. rookie arlington police officer brad miller just joined the department in september and was still in training. he had limited field experience. it's that limited field experience that led to what his department is calling trouble in conduct. >> i have decided to terminate officer miller's employment with the arlington police department for exercising poor judgment. >> reporter: officials say that poor judgment was on display early friday morning when a rookie cop gunned down 19-year-old christian taylor. police were called to an arlington, texas, car dealership to investigate a burglary and found taylor acting erratically. >> officer bradley is seen walking towards the building where christian taylor was located. >> officer miller exercised inappropriate judgment by entering the build alone. this unilateral decision along with failing to communicate with fellow officers created an environment of cascading consequences

the arlington police department fired rookie officer brad miller. he killed 19-year-old christian taylor last week at a car dealership. last night that deadly shooting sparked protests outside the arlington police department. omar is there. omar, good morning. >> reporter: good morning. rookie arlington police officer brad miller joined the department in september and was still in training which means he had limited field experience. it was that limited field experience that led to what his own department is calling troubling conduct. >> i have decided to terminate officer miller's employment with the arlington police department for exercising poor judgment. >> reporter: officials say that poor judgment was on display early friday morning when a rookie cop gunned down 19-year-old christian taylor. police were called to an arlington, texas, car dealership to investigate a burglary and found taylor acting erratically. >> he just crashed through the gate. >> with what vehicle? a stolen vehicle? >> with his vehicle. >> reporter: officer miller is seen w

arlington police say the fbi is now assisting with their investigation to see if officer miller acted lawfully and followed departmental guidelines. >> our pledge is to provide these answers in the most thorough and expeditious manner possible. >> reporter: on saturday, taylor's friends and family held a vigil calling for justice. adrian taylor says he doesn't know why his son smashed his suv into the dealership, but thinks his actions shouldn't have been met with lethal force. >> you're trained to take them with your hand. you shoot to kill? >> reporter: the surveillance system at this car dealership does not have cameras inside the showroom where the shooting occurred and arlington police don't have the body cameras. deek differences say they're waiting for results from an autopsy and toxicology reports before they wrap up their investigation. kristine. >> owe are mmaomar, thank you. >>> police in santa maria are under fire this morning. victor martinez an illegal immigrant with a criminal history is now charged in a murder. marilyn farris was sexually assaulted and beaten with a ha

a professor specializes in geochemistry for the university of texas in arlington. he said the impact of this kind of spill goes way beyond just the look of the river. >> it's all of these metals are in excessive amounts. are dangerous for human life. >> the animus river runs 126 miles and is one of the sources of drinking water for towns surrounding it. basu says there are several ways to try to fix the problem. but the easiest might be letting the fast-flowing river run its course. >> dilution is the solution in a case like this. >> since the leak is not plugged up yet, the epa has decided to build retention ponds around the gold mine. to try to capture any of that contaminated water as it comes out. the epa is clearly frustrated and embarrassed by the situation, saying typically we respond to emergencies. we don't cause them. for "cbs this morning saturday," maria villareal, dallas, texas. >>> coming up, fpaying back a 63-year-old favor. john mellencamp made good with the hospital that saved his life as a baby. an incredible story coming up. >>> but for now, here