Flaw in the system, or government failure?
Check it out:

Due to the lack of a state law allowing officers to check for immigration status, combined with federal regulations under the Obama administration, Texas authorities never checked Zamora’s immigration status and he was never detained. Zamora was simply ticketed and fined $136, according to Walker County court documents.

Two years later in 2013, Zamora and two other El Salvadorian illegal aliens, all reportedly members of the MS-13 gang, allegedly killed and dismembered 16-year-old high school sophomore Josael Guevara in the Sam Houston National Forest. They first allegedly hit him with a baseball bat and then mutilated him with a machete.