Air and Marine Operations (AMO) is a federal law enforcement agency within U.S. Customs
Here are multiple articles about them and their operations.
https://www.google.com/search?hl=en&source=hp&biw=&bih=&q=border+patrol+helicopters&gbv=2&oq=border+patrol+helicopters&gs_l=heirloom-hp.3..0j0i22i30l9.570.6204.0.6405.27.17.1.9.10.0.218.2370.1j14j2.17.0....0...1ac.1.34.heirloom-hp..2.25.2242.Jnc1XjXpsDw
Border Patrol Helicopter Images
https://www.google.com/search?q=border+patrol+helicopters&hl=en&gbv=2&prmd=ivns&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwjSwsvaj7HSAhUBzGMKHe_fCGIQsAQIGg
Put a 7.62 mini-gun on it and it’s golden.
Texas DPS Patrol Boats.
https://www.google.com/search?q=texas+dps+patrol+boats&rlz=1C1CHFX_enUS594US594&tbm=isch&imgil=uUCFudy09zAWfM%253A%253B_3NCiRHg1il7MM%253Bhttp%25253A%25252F%25252Ftpr.org%25252Fpost%25252Ftexas-tries-deal-surge-immigrants-refugees&source=iu&pf=m&fir=uUCFudy09zAWfM%253A%252C_3NCiRHg1il7MM%252C_&usg=__0o4i2l2_Ns7lZCF9p7AMagb-4j0%3D&biw=1920&bih=974&ved=0ahUKEwiBsJ6TkrHSAhVJ34MKHVPvDxQQyjcINA&ei=fI-0WIGCB8m-jwTT3r-gAQ#imgrc=_