shmael brimsley had been arrested trooes 19 times in the past decade since he turned 18. he had been arrested for misdemeanor assault, grand larceny larceny, a lot of other ae offenses. . >> he 45d tried to commit suicide in the past. she said he had been institutionalized at some point. the ex-girlfriend said he held his gun to his own head during that confrontation and apartment threat ping to kill himself with the gun before he shot her instead. >> if if he did act alone, whether he was guided by some ideology, whether there were e there was some you will malt goal in his mine e mind, this is someone who seems to have very little connection with others in his day-to-day life. hi e he seems to be very alone and very troubled. this is a time of incredible tension. there was a reknewed effort today to keep the focus on the officers who was just killed so that they do not represent something larger without us remembering who they were as men. her smile is so white. i was pretty stunned myself. removes fourteen years of stains. see? crest whitestrips work on a deeper level

. >> reporter: meanwhile, police continue to investigate published reports that brimsley may have hadties to a militant prison gang known as "the black guerilla family." earlier this month, new york police were reportedly warned that members of the gang were looking to "shoot on-duty police officers." >> most of his ptings and rants are on the instagram account. and what we are seeing from this right now is anger against the government. >> sreenivasan: we'll have more on t investigation aer the news smary. in an interview broadcast today, president obama said the cyber attack on sony pictures, which his administration blames on north korea, should not be considered an act of war, but he promised to retaliate just the same. >> i don't think it was an act of war. it was an act of cyber-vandalism that was very costly, very expensive. we take it very seriously. we will respond proportionally. >> sreenivasan: in a separate interview, the republican chairman of the house intelligence committee, mike rogers, described the incident as a nation-state attack and said the president could have re

they also revealed tonight that brimsley was a bistand rer against police violence a few weeks ago and that he recorded some of the rally on his cell phone. he then ran into a subway station and took his own life. >> today, new york's mayor call for the city to put aside the protest until after the services for the officers. >> this is a difficult time for both of our families. we are staying together and getting through this together. >> the memorial of the scene of sunday's shootings continues to grow tonight. >> philadelphia police are changing routines and pairing up officers in light of the murders in new york. over in camden, the police chief says nothing changes. chief scott thompson says he won't over-react, but he is telling officers to be individual lent. new at 11:00, a delta employee is accused of helping a passenger smuggle guns onto a plane. according to court records, eugene harvey works as a baggage handler. he's accused of helping former employee mark henry traffic guns several times to new york. detectives say henry used the airline's buddy pass to trafl frequently. t

. >> ishmael brimsley took his own life after killing the two police officers.thor tiffs say he posted aent-police statements on social media before ambushing those officers. >>> the threat against police officers have new jersey state troopers taking action. tonight, there's a shield black out in effect. all officers received a warning to take their police shields out of the vehicles and to be extremely vigilant. support is pouring in from around the country. pennsylvania congressman jim gurloch and pat meehan gathered in west chester to believe the to express their appreciation for police, fire fighters and responders. congressman meehan says a son is a student there, as well. >> autopsy results show bradley stone killed himself by overdosing on drugs. following his killing spree in month gom ri county last week. stone killed his ex-wife and five members of her family. investigators released a report today revealing the iraq war vet had several drugs in his system, include i antipsychotics. stone hit e hid the guns. he was banned from having guns under a veter

officer officers assigned to the post immediately pursued brimsley southbound on tompkins eave. he fled to the g train subway station. he proceeded down the stairs on to the westbound subway plat form. while on the platform, he shot himself in the head, took his own life. a silver firearm was recovered on the platform near the suspect's body. the officers were transported here to woodhill -- woodhall hopt. both officers tragedy succumbed that e to their injuries. on behalf of the new york city police department, i extend my deepest condolences to the families. both officers paid the ultimate sacrifice today, while protecting the communities they serve. the suspect was transported to brooklyn hospital where he was pronounced dead. we are concurrently continuing to investigate this incident. i want to thank at this time for the vail yent efforts to resuscitate our officers. some background information relative to the events leading up to the murder of our two officers today. at approximately 5:45 this morning in baltimore county, maryland, the rereceived inform from the victim's m