AURORA, Colo. (CBS4) – Curtiss Christensen, a former sergeant with the Aurora Police Department, was arrested last week on charges of involvement in a crime and manipulation of physical evidence related to a pipe bomb fall in Aurora. Both charges are crimes.

Christensen, who left Aurora Police Department in 2006, could not be reached Wednesday night by phone, text, or email to comment on the pending criminal charges.

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Curtiss Christensen (Image credit: Aurora)

In a 37-page affidavit from CBS4, Aurora Police detectives accuse their former colleagues of attempting to cover up the pipe bomb detonations allegedly committed in December 2020 and January 2021 by a close friend of Christensen’s, Scott Alan Campbell were. Detectives accuse Christensen of lying to police investigators and getting rid of his SUV, which Campbell allegedly used in one of the pipe bomb explosions.

According to the affidavit for Christensen, “Curtiss Christensen knew that Scott Campbell was responsible for the bombings and advised Scott Campbell to get rid of the evidence before the ATF got involved.”

The case began with the detonation of pipe bombs in Aurora on December 25, 2020 and January 7, 2021 in densely populated neighborhoods. In December, police said a surveillance camera caught a dark-colored SUV with a driver dropping a device with a burning fuse out a window. In the second case, a driver again dropped a pipe bomb from a moving car.

Both pipe bomb explosions were powerful and the investigators wrote: “The probability that someone would be injured or killed if one of these explosive devices detonated was very high. It is logical to assume that the suspect (s) either intended to injure or kill a resident, or were indifferent to the possible harm or death of people in the area. “

Although Aurora Police did not discuss the pipe bomb cases in detail and sealed documents in Campbell’s criminal case, the newly received affidavit states that detectives obtained DNA from both pipe bombs, which were then linked to Scott Alan Campbell, who previously had a criminal record and his DNA was already on file.

They say Campbell “confessed to building and detonating the pipe bombs” and Campbell “wrote a letter of apology to the victims of these events, further admitting his involvement.”

When police investigated the case further, they learned that Campbell was living with Christensen and was dating Christensen’s daughter.

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Scott Alan Campbell (Image credit: Aurora)

After the pipe bomb exploded on Christmas Day, investigators texted Christensen to get help covering up the crime. They say Christensen gave advice on how to cover it up.

“Christensen was known to have committed a crime involving the Nissan Pathfinder (registered with him) and Campbell’s Pathfinder-drawn trailer.” They say Christensen gave tips on how to prevent the police from finding the SUV.

Detectives say when they interviewed the former police sergeant he lied to them repeatedly for what he knew.

Christensen also reportedly told Campbell to “get rid of everything” before the ATF got involved in the case. The affidavit stated: “Curtiss Christensen is a retired police sergeant and would know from this experience that the ATF is primarily responsible for investigating explosives and firearms allegations.”

APD investigators wrote that Christensen “advised Scott Campbell to destroy evidence of his involvement in the pipe bomb detonations before the ATF found out that Scott Campbell was involved”.

Police say six days after the December pipe bomb attack, after learning that Campbell allegedly used his SUV in the Christmas bombing, Christensen donated his SUV – presumably related to the crime – to a Denver charity.

Investigators suspected that Christensen was low on cash and that “Curtiss Christensen is unlikely to simply donate a vehicle that could otherwise be sold for a certain amount of money. In addition, “the affidavit reads,” the evidence suggests that Curtiss Christensen hid physical evidence (the 2004 Nissan Pathfinder) in this case by donating it to Step Denver to prevent it from happening Investigators locate the vehicle. “

After Christensen was arrested last week for first degree arson for tampering with physical evidence and illegally buying firearms, he issued $ 75,000 bail and was released from prison.

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Campbell remains jailed on numerous charges, including attempted murder and arson.