Would someone explain to me how these migrants who supposedly walked across Mexico can look so 'clean' when they get here??

"Border Patrol agents apprehended four sex offenders, including a rapist and men with child sex convictions, attempting to cross the southern border, as agents continue to deal with massive migrant numbers.
In a press release, Customs and Border Protection (CBP) said agents in the Rio Grande Valley Sector in Texas arrested four convicted sex offenders, along with 22 gang members."

https://www.msn.com/en-us/news..../us/border-patrol-na

Border Patrol nabs convicted rapist, child sex offenders coming across southern border
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Border Patrol nabs convicted rapist, child sex offenders coming across southern border

Border Patrol agents in the Rio Grande Valley Sector arrested four sex offenders, including men with rape and child sex convictions, as well as gang members.