Student murder - fresh appeal   View all 7 updates ›  "Don't let
the cowards who took my son's life kill again."  Samuel Guidera
was stabbed to death in 2011. Credit: Met Police handout
Samuel's parents, Sarah and Chris Guidera, said that his death
had given them a life sentence.  They said:  "We still feel a
sense of anger and all we can do is continue to cope with each
day as it comes, with the help of medication, family, friends,
whatever it takes. As parents we have seen the devastation and
heartbreak it has caused Sam's brother and sister, other family
members and friends.   "It could be somebody reading this who
gets the call about the savage death of a loved one next.....
"Time is not a healer, we will never get back to normal; the
people we were before no longer exist. So please look at your
son, brother, uncle, think how you would miss them and if you
know anything come forward; don't let the cowards who took my
son's life kill again."  More top news