The Federal Bureau of Investigation (FBI) is still looking for a missing hard drive owned by Syed Rizwan Farook and his wife, Tashfeen Malik who killed 14 people last Dec. 2, 2015, in San Bernardino, California. Federal agents are also trying to crack the encryption of the suspects' cellphone that could link them to terrorists overseas, per FOX News.

The FBI's Assistant Director in Charge of the Los Angeles Field Office David Bowdich has said that both these devices will be helpful in completing the 18-minute gap in the timeline of events. It could also be helpful in finding out if there will be other attacks based on the number of ammunition found in possession of the suspects.

"As to those devices, obviously we've said from day one, the digital footprint is incredibly important for us to hopefully learn any contacts, any context, and ultimately any intent on their part. I think that's very, very important," Bowdich said.

"I'm certainly not looking past the possibility of a potential secondary attack based on the amount of ammunition they had. Based on all the seeming preparations they had made. Based on all the pipes they had inside the house that could easily have been made into pipe bombs," the assistant director added.

Authorities have gathered a lot of information since the attacks that left 14 people dead and 22 others injured. However, investigators are still looking to fill the incidents that happened from 12:59 p.m. and 1:17 p.m. timeline. The FBI asked for the public's help in filling the gap earlier in January, per the Associated Press.

The Bureau has also hired the services of OWL Cybersecurity to help unlock the codes but has gone nowhere. "Depending on the type of encryption used by the terrorists the FBI may have a very difficult, if not impossible task," Mark Turnage of OWL Cybersecurity told FOX News.

"There are commercially available encryption programs, which are all but unbreakable," he added. Authorities and politicians are urging Google and Apple to use their backdoor encryption software, but tech experts are against the idea because terrorists can easily gain access to it.

In a report by the Los Angeles Times, the suspects' friend and neighbor Enrique Marquez Jr. was arrested and accused of providing the assault rifles used in the massacre. He is also accused of planning an attack with Rizwan Farook back in 2011 and 2012.

Marquez pleaded not guilty on all of his charges saying that he has avoided contact to both suspects since 2012 when he changed his mind about the planned attacks.