At the start of his rally in Costa Mesa, Donald Trump brought members of the Remembrance Project onto the stage. The Texas-based group labels itself as "a voice for the victims killed by illegal aliens."
In an open letter to Republican candidates in March, the Remembrance Project wrote:
"Violent illegal alien crimes, especially crimes resulting in the killings of American citizens, are like none other in our system of legal justice. In every case, the perpetrator was in the country illegally, enabled by a government unwilling to protect our nation’s border and enforce current laws. We are aware that not all candidates have clearly promised to secure the borders, however, there is some very important unfinished American family business that urgently needs your attention."