and the porthole mystery. 70 years on, new evidence in the case of james camb and gay gibson.hat's in half an hour here on bbc news. good afternoon and welcome to bbc news. the metropolitan police are continuing to investigate three separate shootings in london over the weekend, and extra officers supported by armed units, are patrolling the streets. a 17—year—old boy has died, and three other people are in hospital, although their injuries are not considered to be life—threatening. simon clemison reports. to try to tackle violent crime, police had already drafted in more officers this weekend. 0vernight, they were out again. but in a battle against numbers, they had four more shootings in 2a hours. rhyhiem ainsworth barton died of his injuries. my son was a very handsome boy. he's gone. the 17—year—old was said to be playing football near his home in south—east london. he's the 15th teenager to lose their life since christmas. in north london, two shootings, two boys a short distance from each other. they survived, they're 13 and 15. police are investigating whether there's a