Pearsall was identified in April as an inmate at Roxbury Correctional Institution near Hagerstown, where he has been incarcerated since September 2007 on a drug dealing charge, authorities have said.
Pearsall, who was indicted in May 2008 in Redman's death, is expected to complete in 2012 a prison sentence for conviction on a charge of possession with intent to distribute in Allegany County, Md., officials said.
Police have alleged that Pearsall and John J. Grant, aka Butter, took part in an execution-style shooting of Redman in a drug-dealing relationship gone bad.
A jury in November 2007 found Grant, 23, guilty of second-degree murder. He was sentenced to 40 years in prison in February 2008 by Judge Gray Silver III.
"I know I will be in your court room soon, so I hope that we can resolve this matter so that I can move on with my life," Pearsall said in the letter filed Aug. 14 by Circuit Clerk Virginia M. Sine's office.
"Because truth be told, I'm done with this error in my life. I know I have made some mistakes, but I'm trying to change because I have kids and I want to be there for them," Pearsall said.
Pearsall went on to say that was "deeply truly sorry about the situation" and also expressed his condolences to the Redman family.
In a separate letter to Sine's office filed Aug. 25, Pearsall asked about the status of the processing of his speedy trial paperwork and indicated he wished to file a motion for discovery and needed to know what type of evidence "you have on me."
During Grant's trial last year, the jury heard testimony indicating that Pearsall "called the shots" in drug deals in Martinsburg.
Pearsall was arrested in January 2007 in Allegany County by a Maryland State Police trooper in a task force operation and charged with seven drug offenses, according to court records.
At the time, authorities listed a Frostburg, Md., address for Pearsall, who was sentenced to 10 years in prison in July 2007, according to court and jail records.
Three years of Pearsall's sentence were suspended as part of a plea agreement and he was ordered to serve five years of probation.