mireya villarreal looked into what some say is the real crisis -- an immigration system not preparedf children and families seeking asylum. >>> there's a group here ready to cross -- >> reporter: border control agents say the number of daily illegal crossings is unsustainable. >> if we can prevent any illegal entry, that is our goal. >> reporter: in december alone, the department of homeland security says they apprehended more than 50,000 people trying to enter the u.s. illegally along the southern border. thousands more are waiting to make a legal claim for asylum. last year nearly 93,000 asylum cases were filed. >> day in and day out, we go to the courthouse in mcallen and see the effects of zero tolerance. >> reporter: this worker in the rio grande valley says it's president trump's policies toward asylum seekers that have made things worse. >> all of a sudden they started taking babies from their parents. that gave rise to a humanitarian crisis that was not natural, it was manufactured by the government. >> reporter: martin is one of the faces of that crisis. we met him just acro

mireya villarreal was at the southern arizona border yesterday to show us the challenges agents face. >> reporter: this group is part of 180 migrants apprehended by arizona border agents. fernando says this area has become a hotbed for illegal crossings. >> i've seen six different presidents in the time that i've been with the border patrol, and this is the worst crisis that i've seen. >> reporter: you actually use that word, crisis? >> yes. >> reporter: he says these patrols are dangerous, but that hasn't stopped him or agents from doing their jobs despite not being paid because of the shutdown. >> they believe that -- strongly in the mission, and they know we have a job to do. >> reporter: in this part of the border, this is the only barrier between the united states and mexico. just over it is a major highway. buses come right through here. migrants get off and walk right into the united states. last year, border agents apprehended 52,000 people in this area alone. an increase of more than 1,000 apprehensions a month over the previous year. in nearby nogales, the mayor says adding

on the border, mireya villarreal looked into what some say is the real crisis, an immigration system prepared for the flood of children and families that are seeking asylum. >> and there's a group over here getting ready to cross. >> reporter: border patrol agents say the number of daily illegal crossings is unsustainable. >> if we can prevent any illegal entry, that is our goal. >> reporter: in december alone, the department of homeland security says they apprehended more than 50,000 people trying to enter the u.s. illegally along the southern border. but thousands more are waiting to make a legal claim for asylum. last year, nearly 93,000 asylum cases were filed. >> but day in and day out, we go to a courthouse in mcallen and we see the effects of zero tolerance. >> reporter: efrÉn olivarez works directly with migrants seeking asylum in the rio grand valley. he says it's the trump administration's policies toward asylum seekers that have made things worse. >> and all of a sudden they started taking babies from their parents. that gave rise to a humanitarian crisis that was not natu

. >> glor: mireya villarreal reporting once again tonight from the border. mireya, thank you. today, we learned the names of women shot and killed yesterday inside a bank in seabring, florida. as demarco morgan reports, the suspect appeared in court, but the motive remains a mystery. >> zephen xaver. r reporter: appearing via videotape and wearing a black- and-white jump suit, zephen xaver stood and listened as a highlands county judge charged him with premeditated murder. d> the charges are five counts if homicide, murder in the first degree. >> reporter: the shooting happened shortly after 12:00 on wednesday at this sun trust bank in seabring. police say he entered the bank wearing a bulletproof vest armed with a gun. he forced five women to lie down and then he shot them. one bank employee heard the shots and escaped, contacting law enforcement. the shooter also called to 911. >> he told dispatchers that he had killed five people in the bank. wh he's coming out. ar reporter: when police arrived at the bank, xaver was barricaded inside. after negotiations failed, an armored

. >> reporter: mireya villarreal, cbs news, los angeles. >> ninan: and so far, the nationwide spark study examined about 450 families. the preliminary results show genetic links to autism in about 10% of them. all, still ahead, this accidentally invited guest is at a bachelor party this weekend with an even bigger surprise. for adults who have type 2 diabetes and heart disease... ...and lower a1c, with diet and exercise. jardiance can cause serious side effects including dehydration. this may cause you to feel dizzy, faint, or lightheaded, or weak upon standing. ketoacidosis is a serious side effect that may be fatal. symptoms include nausea, vomiting, stomach pain, tiredness, and trouble breathing. stop taking jardiance and call your doctor right away if you have symptoms of ketoacidosis or an allergic reaction. symptoms of an allergic reaction include rash, swelling, and difficulty breathing or swallowing. do not take jardiance if you are on dialysis or have severe kidney problems. other side effects are sudden kidney problems, genital yeast infections, increased bad cholesterol, and ur

mireya villarreal went out on patrol with them along the mexico border. >> reporter: this group is part of 180 migrants apprehended this morning by arizona border agents. fernanado grijalva says this area has become a hotbed for illegal crossings. >> i've seen six different presidents the time that i've been with the border patrol. and this is the worst crisis that i've seen. >> reporter: you actually will use that word, crisis? >> yes. >> reporter: grijalva says these patrols are dangerous, but that hasn't stopped him or agents from doing their jobs, despite not being paid because of the shutdown. i mean, they're working without pay. tomorrow will be the second paycheck that they're missing. >> they believe that strongly in the mission, and they know that we have a job to do. >> reporter: in this part of the border, this is the only barrier between the united states and mexico. just over it is a major highway. buses come right through here. migrants get off and then they walk right into the united states. last year, border agents apprehended 52,000 people in this area alone, an increas