Portion of Orlando Shooter's Calls With Hostage Negotiators to Be Released — Here's What Will Be Edited Out

ORLANDO, Fla. (TheBlaze/AP) — Although the killer is known, the investigation continues into what motivated and enabled Omar Mateen, 29, to carry out one of the worst mass shootings in U.S. history.

Attorney General Loretta Lynch said in interviews Sunday on several news shows that the FBI would release a partial printed transcript of the phone conversations Mateen had with Orlando police negotiators while the shooter was still inside Pulse nightclub.

But portions of the call will be edited out.

"What we're not going to do is further proclaim this man's pledges of allegiance to terrorist groups, and further his propaganda. We are not going to hear him make his assertions of allegiance [to the Islamic State]," she said.

Mourners embrace and gather outside following the funeral service for Christopher Andrew Leinonen, one of the victims of the Pulse nightclub mass shooting, outside the Cathedral Church of St. Luke, Saturday, June 18, 2016, in Orlando, Fla. (AP Photo/John Raoux)

Armed with a semi-automatic weapon, Mateen went on a bloody rampage June 12 at the gay nightclub, killing 49 and seriously injuring 53 others. Mateen died in a hail of police gunfire after authorities stormed the venue.

Lynch told ABC's "This Week" that the top goal while intensifying pressure on the Islamic State — the extremist group thought to have inspired Mateen — is to build a complete profile of the killer in order to help prevent another massacre like Orlando.

AG Loretta Lynch on warning about Orlando shooter: "We're looking" at what FBI could have done differently. https://t.co/Muvm7DyGgc

— This Week (@ThisWeekABC) June 19, 2016

"As you can see from this investigation, we are going back and learning everything we can about this killer, about his contacts, people who may have known him or seen him. And we're trying to build that profile so that we can move forward," Lynch said.

Lynch said she would be traveling to Orlando on Tuesday to meet with investigators.

Speaking to CBS' "Face The Nation," Lynch said that a key goal of the investigation was to determine why Mateen targeted the gay community.

AG @LorettaLynch says DOJ will release partial transcripts of shooter's calls from inside Pulse nightclub tomorrow https://t.co/sCSrOdilOm

— Face The Nation (@FaceTheNation) June 19, 2016

Investigators are still interviewing witnesses, and looking to learn more about Mateen and others who knew him well, including members of his mosque.

A lawyer for the Council of American-Islamic Relations said that the FBI interviewed a man who worshipped at the same mosque as Mateen. Omar Saleh said he sat in on the Friday interview at the Islamic Center of Fort Pierce, the same mosque that Mateen attended near his home. Saleh said the interview lasted about 30 minutes.

Counter demonstrators show support and solidarity near the funeral service for Christopher Andrew Leinonen, one of the victims of the Pulse nightclub mass shooting, outside the Cathedral Church of St. Luke, Saturday, June 18, 2016, in Orlando, Fla. (AP Photo/John Raoux)

Meantime, the wave of support for shooting victims and survivors continued Sunday. Memorial services were scheduled for a number of churches in Orlando and a vigil was to be held Sunday evening. Around the city, people prayed on the street and left balloons, flowers, pictures and posters have been left to honor the victims.