Legado de un "Gangster"

This Spanish-language science fiction story, "Legado de un 'gangster'" (A Gangster's Legacy) by Alan Star, concerns a covert operation by the Spacial International Police (SIP) on Mars. Criminal organizations are targeting Fred Singer, a master safecracker imprisoned in the Desert Penal, sending him packages and money. Agent Frank Reed, resembling Singer, undergoes months of intensive training—learning safecracking techniques and absorbing Singer's personality, memories, and mannerisms—to impersonate him upon release. Reed's wife and child assume the identity of Singer's estranged family. The real Singer accepts a lucrative position in Germany testing safes. When "Singer" (actually Reed) is released, he travels by helicopter toward Marsville, carefully maintaining his assumed identity and emotional detachment, aware he may be under surveillance and that dangerous work awaits him among Martian criminal elements, which he must infiltrate alone without police support.