Oscar Pistorius Murder Trial: Friend Details Olympian's 'Big Love Of Weapons,' Itchy Trigger Finger

In the seventh day of the Oscar Pistorius murder trial, a friend of the runner said that on two occasions, the double-amputee Olympian fired guns under dangerous, unusual -- and illegal -- circumstances.

Darren Fresco Tuesday testified in South Africa's Pretoria Magistrate's Court, where Pistorius is on trial, accused of murdering girlfriend Reeva Steenkamp during a Valentine's Day spat last year.

Fresco said that two incidents (previously discussed in the trial) in which Pistorius is accused of violating firearms statutes -- charges which the "Blade Runner" denies -- did indeed happen.

In one case, Fresco said Pistorius fired a Glock 27 .40 caliber pistol, he'd handed him to browse, inside a restaurant in Johannesburg a month prior to the Steenkamp shooting. Fresco said he took the blame to protect the runner's then-sparkling image.

Fresco explained why he handed his gun over to Pistorius at the eatery, saying, "I knew that he had a big love for weapons ... but my assumption was that he had competency," to handle them.

In the other, Pistorius "without prior warning ... shot out the sunroof" of his car after an altercation with a police officer in 2012, Fresco told the court, after the lawman held a licensed gun Pistorius had on his person.

"He was furious that someone else had touched his gun," Fresco recalled, adding that right after the incident, "we went to a house to go see someone about a firearm."

Watch the video on RadarOnline.com (Warning: Content, Language Is Explicit)

That testimony alone could spell serious trouble for the embattled athlete, as he's charged violating firearms laws in both instances, pleading "not guilty" to both. As we previously reported, should Pistorius convicted of premeditated murder, he could be sentenced up to life with a 25-year minimum sentence. If convicted of murder, he could face up to 15 years behind bars.