Omar Castillo-Casiano pled guilty to one count of illegal reentry in violation of 8 U.S.C. § 1326, and now appeals his sentence. He contends that the district court erred in failing to depart downward from the sentencing guidelines range on the basis of the nature and circumstances of his underlying aggravated felony conviction. At the time of his sentencing, Ninth Circuit law precluded a departure on that basis. An intervening en banc decision of this court overturned the earlier rule, however, and held that a district court may use the nature of an underlying conviction as a basis for departure. The government asserts on appeal that because Castillo-Casi-ano failed to raise the issue below, the plain error standard applies. We conclude, with hindsight not available to the district judge, that the district court’s failure to consider whether the nature of the underlying conviction warranted a downward departure constitutes plain error. We therefore vacate Castillo-Casiano’s sentence and remand for resentencing.
I. FACTUAL AND PROCEDURAL BACKGROUND'
Omar Castillo-Casiano was arrested and pled guilty to one count of being a deported alien found in the United States under 8 U.S.C. § 1326. In March 1998, San Diego police officers made a traffic stop of a vehicle containing three men that the officers had observed leaving a residence where suspected drug trafficking was taking place. Castillo-Casiano was a passenger in the car. He had no identification, and told the police that he had no legal status in the United States. The police officers contacted Border Patrol agents, who interviewed him and determined that he was in the United States illegally and that he had a record of prior immigration violations and criminal convictions. Castillo-Casiano eventually admitted to these facts and pled guilty to violating § 1326.
The probation officer who prepared Castillo-Casiano’s pre-sentence report assigned a base offense level of eight for a violation of § 1326. The officer recommended that the offense level be increased by sixteen levels, pursuant to U.S.S.G. § 2L1.2(b)(l)(A), because Castillo-Casiano had been previously deported after a conviction for an aggravated felony — possession for sale of crack cocaine. In 1993, Castillo-Casiano had been convicted of selling $20 worth of crack cocaine, and in 1994, of selling $10 worth. The probation officer also recommended that the offense level be reduced three levels for acceptance of responsibility. This gave Castillo-Casiano a final offense level of 21.
Castillo-Casiano received a criminal history score of 12. He was assigned three points for the 1993 conviction, three points for the 1994 conviction, and three points for a 1996 conviction for being a deported alien found in the United States. He received an additional two points because he was on supervised release at the time of the instant offense, and an additional one point because he committed the instant offense less than two years after completing his term of imprisonment. With a criminal history score of 12 and an offense level of 21, Castillo-Casiano’s sentencing guidelines range was 70-87 months.
Castillo-Casiano requested downward departure on three grounds: (1) over-representation of criminal history; (2) cultural assimilation to the United States; and (3) a “unique combination of factors.” He did not request a departure based on the na *789 ture or circumstances of the aggravated felony underlying the 16-level § 2L1.2(b)(l)(A) increase. The trial judge refused to grant the requested downward departures and sentenced Castillo-Casiano to the low end of the guideline range, 70 months in prison.
II. LEGAL BACKGROUND
In
United States v. Rios-Favela,
While Castillo-Casiano’s appeal was pending, this court, sitting en banc, overruled
Rios-Favela
in
United States v. Sanchez-Rodriguez,
III. DISCUSSION
Castillo-Casiano requests that we vacate his sentence and remand so that the district court may exercise its discretion to depart downward under
Sanchez-Rodriguez.
Although
Sanchez-Rodriguez
was announced after Castillo-Casiano was sentenced, the government rightly concedes that criminal defendants may take advantage of new rules announced while their appeals are pending.
See, e.g., Griffith v. Kentucky,
Plain error occurs where there is (1) error, (2) that is plain, and (3) the plain error affects substantial rights.
See, e.g., United States v. Olano,
In Olano, the Supreme Court explained the third prong of the plain error test— that the plain error affects substantial rights — in the following way:
The third and final limitation on appellate authority ... is that the plain error “affec[t] substantial rights.” This is the same language employed in [Federal Rule of Criminal Procedure] 52(a), and in most cases it means that the error must have been prejudicial: It must have affected the outcome of the district court proceedings. When the defendant has made a timely objection to an error and Rule 52(a) applies, a court of appeals normally engages in a ... so-called “harmless error” inquiry — to determine whether the error was prejudicial. Rule 52(b) normally requires the same kind of inquiry, with one important difference: It is the defendant rather than the Government who bears the burden of persuasion with respect to prejudice.
We have held that in a sentencing case, harmless error analysis is applicable where the district court errs by failing to consider exercising its discretion.
See United States v. Mendoza,
Although
Mendoza
concludes that harmless error analysis is appropriate in cases such as this one, the
nature
of the harmless error review to be applied is strictly limited. According to
Mendoza,
the “special expertise” of district courts in making sentencing determinations makes it impermissible for courts of appeals “to exercise the discretion, for the district court, or to define in advance what might constitute an abuse of that discretion.”
Id.
at 515. Rather than attempting to determine whether the district court would have granted a departure had it been aware of its discretion to do so — that is, rather than “exereis[ing] the discretion for the district court” — in
Mendoza
we limited our harmless error inquiry to the resolution of two questions. First, we inquired whether anything in the Guidelines would have
prevented
the district court from granting the requested departure.
See id.
at 514.
2
Second, we inquired whether the particular facts surrounding the defendant’s conviction and sentence “might possibly” have supported a departure.
Id.
at 515.
3
Because there was nothing in the Guidelines that foreclosed the departure Mendoza requested, and because the facts might possibly have supported such a departure, we held in
Mendoza
that it was
not
possible to conclude that the district court’s erroneous belief that it lacked discretion to depart “ ‘did not affect the ... selection of the sentence imposed.’ ”
Id.
at 514 (quoting
Williams v. United States,
Here, the first part of the harmless error inquiry required under Mendoza has already been resolved: Sanchez-Rodriguez makes clear that there is nothing in the Guidelines that prevents a district court from departing downward from a § 2L1.2(b)(l)(A) increase based on the nature of the underlying aggravating felony. The only question, therefore, is whether the facts of this case “might possibly” support a district court’s decision to engage in such a departure. Again, we must not “exercise the discretion for the district court”: we may only determine whether the facts could possibly support such a departure. It appears clear that they could. Castillo-Casiano’s sentencing increase was based on prior convictions for the possession for sale of $10 and $20 worth of crack cocaine. Given the range of felonies that can underlie a § 2L1.2(b)(l)(A) increase, including murder and rape, see 8 U.S.C. § 1101(a)(43)(A), there is no doubt that a district court “might possibly” conclude that convictions for possession for sale of $10 and $20 worth of crack do not warrant the full 16-level increase in base offense level. Indeed, the district court in Sanchez-Rodriguez granted its downward departure from the § 2L1.2(b)(l)(A) increase because the defendant’s 'underlying felony *792 conviction was possession for sale of $20 worth of heroin.
Under these circumstances, we cannot conclude that the district court’s belief that it lacked authority to depart at the time of Castillo-Casiano’s sentencing “did not affect [its] selection of the sentence imposed.”
Mendoza,
Because the three prongs of the plain error test are satisfied, we will reverse and remand for resentencing if the plain error “seriously affect[ed] the fairness, integrity, or public reputation of judicial proceedings.”
Johnson,
It is easy to see why prejudicial sentencing errors undermine the “fairness, integrity, and public reputation of judicial proceedings:” such errors impose a longer sentence than might have been imposed had the court not plainly erred. Defendants like Castillo-Casiano may be kept in jail for a number of years on account of a plain error by a court, rather than because their wrongful conduct warranted that period of incarceration. Moreover, there is little reason not to correct plain sentencing errors when doing so is so simple a task. In the context of convictions, it is the potential costs of error correction — undoing a jury verdict or an entire trial, or letting a guilty defendant go free — that have led courts on occasion to decline to “notice” plain errors where the evidence of guilt was overwhelming.
See., e.g., Johnson,
VACATED and REMANDED for further proceedings in accordance with the opinion.
Notes
. Before making this concession, the government argues that the district court's decision not to depart downward is not appealable because it amounted to an exercise of discretion.
See, e.g., United States v. Morales,
. For example, the Mendoza court considered and rejected the government’s argument that the district court was barred from granting Mendoza’s requested departure because the Guidelines explicitly consider the purity of the methamphetamine in establishing the base offense level.
. For example, the court concluded that defendants who lack knowledge and control over the purity of the methamphetamine involved in the crime, such as Mendoza, "might possibly” constitute only a small subset of the total number of cases encompassed by U.S.S.G. § 2D 1.1 — the guideline under which Mendoza was sentenced. See id. Accordingly, the court held that Mendoza might not fall within the heartland of § 2D 1.1 and that, therefore, the facts could support the requested departure.
